Spirit of Forbidden Passion

"-My owner in all things and I his slave" Rainbow said in a tired, horny voice.

Bow smiled in victory as a collar with a leash attached to it formed around her neck. "Good girl, my little slut! Now your father and I have fused forever, and you will be mine until the end of time!"

Rainbow looked up at him, and replied. "I know, master, please, just fuck me! I need to cum!"

The gestalt stallion smiled wickedly before increasing his pace. "Just because my slave has begged me so nicely, then I suppose I can grant your request." He flexed his cock in her, making sure her g-spot was hit just right. "And you can cum for me as many times as you're able. After today, though, I may not be quite so generous."

Rainbow's deeply aroused brain ignored this, focusing instead on fucking back against the magnificent cock plumbing her depths, proving its dominance over her pussy and womb. "Fuck me, master, fuck me!" she half-begged and half-commanded.

"And I shall, my little slut, and breed you, too. You're going to have my foals until the day I tire of you, but that won't be for a long, long time." Bow replied as the light of the sun fell on them both. "Beg for me to turn you into my broodmare, beg me for the privilege of being my foal factory!"

Rainbow did just that, spouting gibberish about being a bred whorse, a slave who's only function was to provide a set of holes and a womb for her father and master as she started to orgasm again and again around his cock.

Bow howled in glee as he saw her cumming her brains out at the idea before filling her yet again.

-

Rainbow awoke, mind racing as her hand went to her neck, feeling for the collar that she felt was supposed to be there. A presence that filled her with despair. "I thought you were supposed to disappear with the sun!" she wailed.

Bow walked over, cock bobbing in front of him, filling the nose of his slave with his dominant scent. "Slave daughter, suck my cock!" he commanded. A command that Rainbow found herself following without complaint or argument. Sucking on the erect pillar of blue flesh, she looked up at her father, questions in her eyes. "You read the inscription on my former home, but you didn't read enough of it." The pumpkin statuette in question floated over, and the inscription refreshed itself. "By Sin am I awoken, and by Sin do I bind. Stay steadfast, and leaving will happen by the light of day. Pacts are forever binding, though your sin shall never be known." He ran a thumb over the surface. "You agreed to be my slave, slut, so I'm here for good, and your Daddy and I will always be one, and he's not only stopped fighting me, he's helping me find ways to use, abuse and pleasure our daughter slave."

Rainbow let out a sob as she thought about her failure, and all the things she was going to miss. The Wonderbolts, her friends, and even her job! All of them given up to the care of her master.

Bow cleared a tear from her eye. "Don't be sad, Rainbow. I'm still going to let you visit your friends, but I'm afraid becoming a Wonderbolt is never going to happen." At her glance up, she looked at him with fear. "I can read your surface thoughts, my lovely slut. Also, no need to fear about your reputation, the magic of the binding is such that the two of us could fuck in front of Princess Celestia herself and the only potential negative consequence to us is one of us slipping on the floor."

He ran his hand through her hair, soothing her as she blew his cock. "So don't worry, you'll get to be what you were always destined to be, a mother and a fucktoy to the right stallion, me." And with that proclamation, he started to fuck her throat like he would her pussy before dumping a huge load into her stomach.

-

A week had passed, and Windy Whistles finally returned home from her conference. She spotted her husband in the kitchen fucking their bound daughter. "Honey, I'm home!" she called with joy as she saw him working up another load to dump in their cumflated daughter. "And Rainbow is here, too! What brings you by, honey?"

Bow leaned down next to her ear and whispered to her "tell her."

Rainbow looked up at her mother, strain on her face as she did her best to answer while being fucked. "I'm *pant* moving back in, Mom." She pushed back against her master's wonderful, dominating cock. "I want us all to be together as a family again."

Windy smiled big. "Oh wonderful! It'll be so good to have you around the house again. Momma's perfect flyer."

That night, she didn't notice or care as her still cum-leaking daughter crawled into bed with her and her husband. "Night honey, night Rainbow." she called sleepily, happy to finally sleep again in her own cloud bed.

Bow hugged his wife and gave her a kiss. "Goodnight snookums." He then reached down to his groin, where a bound Rainbow Dash lay with her father's erection down her throat. "Goodnight, fucktoy, sleep well."

Rainbow only answered with a deep-seated, lusty groan as she fully accepted her role as fucktoy and broodmare.