A bright sunny day shines down on the island where Twilight Sparkle and Flash Sentry are stranded on. Twilight is seen in the house she and Flash built together during their time as they waited for help to arrive. Twilight's body is different as her breasts are a bit bigger, as well as her muscles and her mane grew longer. Twilight sits on one of the two beds that have been built by her and Flash as she had her book out and began to write an entry into it.

"Dear diary, we have been stuck on this island for 186 days now." Twilight thought as she wrote in her diary. "I've tried to send magical SOS messages, but it feels like they get blocked every time I try to send them. Me and Flash have grown much closer during our time here." Twilight let out a loving sigh as she thought about him before she continued. "His physical strength has come in handy from time to time when I couldn't use my magic anymore." A look of worry appeared on her face as she continued writing. "I fear that no one is searching for us anymore. They probably announced our death by now. Flash keeps telling me that help will come and to never give up hope, but I have my doubts."

Twilight had a small smile on her face as she continued to write. "During my time here, I have begun to see Flash in a new light. He may not be the Flash Sentry I meant in the human world, but he's similar in some ways. Since we arrived on this island he hasn't treated me like a princess or as a friend, but as a mare who needs to pull her weight for us to survive the situation. Flash has taught me some things to do to survive on this island, such as how to lift with my legs without my magic and a few other things as well. I only have one pen left, so I can't keep writing daily. I'll only hope to write in this again soon."

Twilight stopped writing before closing her book just as Flash walked in. Like Twilight, his body is also changed as his muscles also grow as his arms have beefed up and he has a six pack abs. His mane grew as well and he also started to grow a beard a little on his face. "Hey Twilight, how are you doing today?" He asked with a small smile.

"Hey Flash, I'm okay." Twilight responded before she wondered something. "Where have you been the whole day?"

"I was in the forest." He answered. "I found a cavern and multiple banana trees while I was wandering there. I even picked some bananas, so we have something to eat today."

"I thought we agreed to search for food together today?"

"Yeah, we did, but you seemed to need some time alone, so I didn't want to disturb you." He admitted as he rubbed the back of his head.

"I…" Twilight started before she let out a sigh and smiled at him. "Thank you Flash. It's just, we've been here for so long now. I doubt I could survive this long alone."

"Well, that's why I'm here." He reminded her. "I would be a pretty bad royal guard and an even worse friend if I didn't help you in any way I could. Although I'm pretty sure you would do fine alone." Twilight smiled at his compliment before she looked down with a sad look. Flash has seen that look before from time to time and can tell something is bothering her. He walked over and sat down next to her on the bed. "Okay Twi, what's bothering you? I'm here to help you and listen if you want to tell me."

"I miss home, Flash." She admitted as her ears dropped back. "I miss all my friends. My mom, my dad, and their teasing. My big brother, Cadance, and my niece Flurry Heart."

"It's okay, Twilight. I miss my family too." Flash assured her as he placed his hand on hers. "My little sister and my mom are probably worried sick by now. But that doesn't mean they won't come for us. After all, you are one of the princesses of Equestria. You're very important to them and everything. I doubt that friends would ever give up on you no matter what."

Twilight let his words touch her heart before she let out a sigh. "You're right, Flash. I really needed to hear that." She told him as she started to hold his hand. "Any mare out there would be very lucky to have you as a lover. If I could choose to marry anypony, I would choose you. You're so kind, strong, and thoughtful. I would love to be married to you with all my heart."

"I… err…" Flash had his words stuck in his throat as he was surprised to hear Twilight say that about him. "That's well… thanks for the compliment." He mentioned as he rubbed the back of his head while he blushed a little.

"Flash, would you marry me if you could?" Twilight asked as she blushed a little too. "You're somepony who understands me and is not just after a title or riches."

"That's a weirdly accurate question." Flash thought before he smelled an odd scent. "Wait, what's that smell? It's so sweet and, and… Hold on, it's summer. So that means…" His eyes went wide with realization. "Oh no, this isn't good."

"Flash, are you listening?"

"Sorry Twi, but I think I know what's going on." Flash told her before he took in a deep breath and looked at her. "You know it's that time of year again, and we're stranded on this island so you can't get any potions to reduce the effects of your situation?"

"What are you talking about?" She asked with a raised brow before she realized what time of year it is. "Wait, it's summer already? So then…"

"Yeah." Flash responded. "I'm the only male as far as we know on this island. So your hormones are messing with you right now. Maybe it's best if I stay in the caverns I found for a couple of weeks until you cool off. Don't get the wrong idea, I just don't want to take advantage of you like that."

"No, it's okay, I understand." Twilight assured him. "If you think that's best for us."

"I promise I will be back once you cool off." Flash told her before he quickly stood up. After exiting the building in a hurry, Flash breathes in the fresh air after escaping Twilight scent. "By Faust, her scent grew stronger the moment I talked to her about her heat. And her voice, it's so sexy when she talks like that." Flash realized what he just said before he smacked himself. "I need to get out of here and clear my head. I really don't want to hurt Twilight. She's in heat, that's why I'm thinking like this." He breathed in but couldn't help but think about her. "Twilight has developed into a fine-looking mare." He quickly smacked himself again and shook his head. "No, no, no! You swore to protect her and I'm not going to take advantage of her like this. But she's just so beautiful– Gah! Damn it, focus Flash and stop thinking like that!"

Flash then made his way towards the caverns he talked about before and Twilight watched him leave through the window. Twilight let out a frustrated sigh before she fell back onto the bed. "You need to control yourself, Twilight!" She told herself. "Just don't think about him and probably go to that lake you found it before to cool off. Don't think about how his muscles became bigger or how big you saw him when you first saw it when you made him that loincloth…" She felt herself getting hotter before she screamed into her pillow. "I said to not think about him!"

Twilight then laid on her back and stared up at the ceiling. No matter how hard she tried, she couldn't stop thinking about him and all the times he helped her. She remembered the time he showed her how to chop wood and how he got sweaty from curing all that wood around. She remembered how that sweat traveled along his muscles and only made her heat grow worse. She felt how wet she was becoming before her hand moved on its own and started rubbing on the fabric of her skirt. She let out a soft moan as her fingers rubbed against the makeshift fabric before her other hand reached up to her breast and squeezed it. "Maybe…just for a little bit…" She told herself before she moved the skirt and the shell bra and tossed them across the room.

It has been a couple of days since Flash went into his self-imposed exile. He left a message saying that he would be leaving some by a palm tree by the beach if she worried about him. However, Twilight hasn't sent any messages by the tree or with her magic, nor did she answer any of his. Flash grew worried something might have happened to her just as he saw a storm rolling in. Once the storm hit the island, Flash decided for better or worse, that he needs to see Twilight is safe.

Flash was running towards the house they made as the rain was coming down hard. Once he had made it, he opened the door and quickly got inside before closing the door behind him. "Ohh… Flash, you're finally here." He heard Twilight's voice.

"Twilight, are you okay?" He asked as his back was to her. "You haven't tried to message me at all with your magic or left any by the tree. And you haven't answered any of mine, so I got really worried." He turned around to face Twilight, only for his eyes to open wide as his cheeks turned red. Flash found her naked on her bed and pleasuring herself at a fast pace while she looked at him with bedroom eyes, trying in vain to quill the heat within her.

"Flash, this heat is unbearable!" She moaned out as she continued to play with herself. "I need you, I want you inside me now!"

"Eehh… Maybe I should come back later, Twilight." He told her as he slowly backed away. "You seem to be busy." Just when he was about to open the door, the horny mare teleported in front of him and pinned him against the door. Twilight then tries to strip him of the only clothing he has, but thanks to his training, Flash quickly catches her arms and stops her. "Just hold on Twilight! You aren't thinking clearly and need to calm down!"

"Oh, I am thinking clearly, Flashy, and it seems little Flashy is thinking clearly too." Twilight teased as she could see something slowly becoming erect underneath his loincloth.

"Please Twilight! I don't want to do something we both might regret later!" Flash tried to reason with her. "I care for you, I will admit that! But I promised to protect you and I don't want to take advantage of you like this!"

"That's so kind of you, but you don't have to worry about that." Twilight told him with a lustful grin on her face. Now that we're alone here, we can have all the fun we want and maybe even more."

"Twilight, get a hold of yourself! You really don't want to–" Flash tried to tell her again before she placed a finger on his lips.

"Flashy, I love you and have always for a long time." She admitted in a lustful tone. "We might be here for good. And I want to experience motherhood, and you are the only one I trust enough to do this."

"I… I don't know what to say." Flash was lost for words. "I'm honored that you feel that way. I… We… Please Twi, it's getting hard to control myself. Your scent is just too powerful, I don't want to hurt you."

"You won't hurt me, Flashy." She assured him before she felt something poke her. "Little Flashy is getting harder. You want this just as much as I do. Breed me, and make us a family." Before Flash could say anything else, Twilight pushed her lips to his. This has him enveloped in a deep and lustful feeling that both their lips have longed for.

"Oh Celestia, please forgive me!" Flash thought as he started to kiss her back. "I can't fight it any longer and these lips of hers taste so sweet." Their tongues started to swirled around each other as his cock lifted up his loincloth.

"He's using his tongue!" Twilight thought as she moaned in their kiss. "I knew he wanted this just as much as I did!" She then wrapped her arms around his neck as he placed his hands around her waist and they pulled each other in closer. After a hot passionate kissing, Twilight gets down on her knees and removes his makeshift loincloth away. Twilight licked her lips at the site of his big hard cock before she began to stroke it a bit.

Flash groaned as he felt her soft hands stroke his cock. After she got enough stroking her prize, Twilight began to lick his cock, starting from the base of his cock to all the way to the tip. She loved the taste of his cock that she repeated this action for a bit before she took the tip of his cock into her mouth. Flash held her head as she began to suck on his cock while moving her head forward and back on it. As she gave him a blowjob, Twilight began to rub her clit while she was enjoying the taste of his cock.

"Oh, sweet Celestia!" He moaned as his head rested back. "Have you done this before? Because, you're such a natural at this…"

"Oh Flashy, thank you." She thought as her other hand cupped his balls. "And thank you, Cadance and Shining. Looks like that little lesson you gave me when I walked in on you both after getting drunk in your room paid off." Twilight moaned around his cock as she loved every inch of it. "You taste so very good."

"Tw-Twilight… if you keep going like that, I'm gonna cum…" Flash grunted before he felt her release his cock. Twilight rose up and looked him in the eye.

"Not yet, Flashy." She told him. "If you're going to cum, you're cumming in my womb." She then pulled him over to the bed before they got on to it. She then presented her ass towards him as she was in a doggy style position. "Now fuck me! Fuck me so hard until I can't walk straight!"

"Your wish is my command, your highness." Flash placed both his hands on her ass before aiming his cock towards her wet entrance. He rubbed his cock against her cunt just to tease her before he gently pushed it into her slowly. Both of them huffed as he entered her before he pushed in until he was all the way into her. He gave one last push until a loud clap was heard when his pelvis smacked against her ass. "Oh fuck, Twilight!" He grunted as he pulled back and repeated this action. "Your cunt is so tight and warm! Not only that, but your rear is so magnificent!" He started to speed up his thrust as Twilight moaned in pleasure. "By Celestia, I'm a lucky bastard!"

"Yes! Flashy, you're so big!" Twilight moaned as she felt her tight walls around his cock. "I want all of you inside of me! I'm your mare and you're my stallion, my love!" Flash continued to rut her until she used her magic to pull him out. "Wait, I want to show you how much of a mare I am of yours!" Flash then laid on his back before she got into a cowgirl position and slammed her hips down on his cock. As she began to bounce on his cock, Twilight guided his hands to her breasts as she looked down on him. "Imagine how big and beautiful they are when they are full of milk for our foal!"

"Oh yeah, Twilight!" Flash moaned as he began to massage her breasts. "Your boobs look so beautiful!" He then sat up and started to suck on her right nipple, causing her to throw her head back and moan louder. Hours pass as the sun starts to lower while Flash and Twilight continue to enjoy each other's bodies. Their manes and tails became all messy with their hours of passion together. Changing positions again, Flash starts to fuck Twilight from behind as they stood the edge of the bed. Flash moved his hips at a fast paced and he thrust deep into her while he was giving her some good hard smacks to her ass.

"Oh you naughty mare!" Flash teased her with each thrust and smack. "You're so wet, what would Celestia say if she sees her student acting like some common slut?!" He then leaned forward as Twilight hung her tongue out of her mouth like a dog in heat. "Say Twilight, are you a slut?"

"Yes!!! I'm your slut!!" She exclaimed before she felt him nibble on her ear. "I'm just a set of holes for you!!" They soon changed positions again as she laid on her back while Flash held up her legs and thrusted into her. Twilight dug her nails into the bed as he thrusted harder into her. After a long evening of carnal sex, Twilight felt his cock throbbing inside of her and knew what this meant.

"Fuck, Twilight…I'm gonna cum!" Flash grunted as he grit his teeth.

"Do it, Flash!" Twilight demanded. "Cum with me! Fill me up with your seeds and get me pregnant with your foal!" Flash gave a few more thrusts before plunged his seeds into Twilight's womb. Twilight howled in pleasure as he felt him cumming inside her and flooding her womb.

"By Celestia, Twilight!" Flash grunted as he felt himself still cumming. "You're milking me dry!"

"Yes Flashy! I feel so full!" Twilight moaned as some of his cum flooded out of her womb and on to the bed. "Give me all your love!" After their love making session, Flash and Twilight laid on the bed as his cum flowed out of her cunt. He placed a hand on her belly and rubbed it as he already imagined how sexy Twilight will look when their foal starts to grow in her.

"You know, I wouldn't mind staying with you for the rest of my life Twilight." Flash admits as he looks at her with bedroom eyes and a small smile. "But if we do get off this island, you and Princess Cadance will have to convince your brother not to kill me." He then looked towards her belly and wondered something. "So, you think it took?"

"You're so sweet, Flashy." She told him with a small giggle. "If we end up staying here, I know you will take care of our family." They gave each other a small kiss on the lips before she looked in the eyes. "As for if it took, I'd say we better make sure and do it again. After all, we have all the time in the world."

"Hmm… Tempting offer, Twilight." Flash told her as he lifted her chin up. "But how about we just cuddle for a while first? I'm a little tired."

"I won't argue with that, my love." Twilight admitted. "I know you can't get enough of me." They gave each other one last loving kiss before they cuddled together. As they rested in bed, Flash felt like this was just the beginning of one hot summer with Twilight on this island.

Author's Note

If there's anyone out there who would like to help me with the next chapter, please let me know in the comments below.