“That was fun...” Twilight's father said as he walked to the door of her room. He opened and slammed the door without another word. Twilight lay on bed, her pillow still gripped between her teeth. Her eyes were still clenched shut and she was still clenching the blanket between both her hooves. He hind legs were locked at a ninety degree angle, just as her father had positioned them. She stayed this way for many minutes after her father had left and the room was silent.

She dared not even open her eyes by the fear that still resided inside her little heart. The heat and pain radiated from her private parts. She finally groaned and opened her eyes before slumping to the bed and rolling over. Tears stained her pillow and rolled down her cheeks as she looked at the ceiling.

“When will this ever end? What did I do to deserve this? I've been such a good filly. What did I do wrong, daddy?” Twilight whispered to herself as a new tears welled in her eyes.

~

“Mom stop!” Shining pleaded to his mother as she began stroking his limp member, trying to re-harden it for a third round.

“Hush young man. I am your mother and you will do as I say, is that understood?” She snapped at her son, skillfully stroking his member. After minute passed and she could not get his penis to stand erect she gave up.

“Oh, you are no fun... I'll be back tomorrow night.” She said sternly as she got off her bed and headed for the door. Once Shining could no longer hear her hooves clicking against the floor, he rolled onto his side, then curled into a ball.

“Why do I feel so... dirty?” He asked himself. Every time they did this, Shining had such a feeling of shame afterwards but he did not know why. It was just like his gut was telling him he was doing something VERY wrong.

His mother had been doing this ever since he had come to her with a question regarding all these strange urges he was having. But no matter how many times they did it; or his mother reassured him this was normal, Shining was always left with a feeling of filthy shame.

~

“Then you add the variable back in, and then subtract and that's it.” Shining explained pointing at the paper in front of Twilight. As they lay on her bedroom floor together.

“Oh, I see now. Thanks big brother!” Twilight chirped, quickly scribbling numbers down to finish her homework.

“Sure, Twilight.” He said. Shining looked outside, it was late. Around bed time for Twilight. Unfortunately for Shining; puberty has a way of giving young colts erections at the most inopportune times. Shining felt his member start to stiffen under him. He swiveled on his hip from where he lay next to Twilight, turning away from her.

“What's wrong, big brother?” Twilight asked by his sudden motion.

“N-nothing...” He tried to play it off, wishing his erection away. He wanted to leave but knew standing would fully display it to his younger sister.

Twilight, being ever curious, had to learn more about her brother's rash behavior. She stood and tried to circle her brother. Shining saw her actions and tried to turn away from her more but his hind hoof smacked into the wall, stopping him. He crossed his fore hooves in a vain attempt to hide himself but his semi-hard penis was blatantly exposed.

“B-big brother...” Twilight started, recognizing the thing between her brother's legs as the same 'thing' that always made her hurt so much those nights when her father came to her room. At first she was frightened, thinking Shining intended on using his 'thing' to hurt Twilight like her father had.

Shining blushed hard as his sister stared at him. He was clearly upset. Twilight noticed that her brother was not near as aggressive as her father had been, atop the fact that Shining seemed upset about the whole thing.

Twilight then remembered how much her father's demeanor changed whenever he finished, going from aggressive and almost angry to completely relaxed and satisfied. Twilight hated to see her brother flustered.

“B-brother?” she started. “Do you want me to help you?” She offered.

Shining looked up at his sister in shock, not sure how to react.

This was the first time Twilight relieved Shining of his tension. Which became a fairly normal occurrence between the two, in secret without their parents' knowing, fearing what their retribution would be.

Shining soon found out that the only thing that Twilight was reluctant to do was offer her marehood. But, the few times she did allow him to take her, she was much less afraid then she was when her father had forced himself on her.

Author's Note

this was only made because of some people pointing out that chapter 1, and especially chapter 2 are out of no where, it was mindless clop, doesn't help the story, and is completely out of place in this story. so instead of deleting or altering chapters 1 and 2, i simply put in a prequel to make those chapters make more sense.