Note: If sex between brother and sister bothers you then you probably don't want to read this story. Read the previous chapter(s) if you have not done so, it sets up the context for this chapter. Enjoy. All rights reserved.
*
Jason found himself awake again, he was initially worried that everything from the previous evening had been just a dream but then he realized that his sister had crawled into bed with him sometime in the night.
Jason woke up from Rebecca holding him closer to her, he felt her breasts and nipples push against the side of his body. He felt his dick stiffen again. As she stirred awake Jason said, "Becca what are you doing? What if Mom came in and saw us like this?"
Swinging her leg over her brother, mounting his crotch. Jason felt his dick get even firmer as he felt the warmth of his sister's pussy. "Then I'll just tell her that I got cold," she said as she giggled when felling his dick. She wiggled against him as she dismounted and got off his bed.
"Are we going to talk about last night?" he asked with concern. As his feelings were mixed, his sister is really attractive and sexy but that's the problem... she's his sister.
"What is there to talk about big brother? I sucked your cock and you came down my throat and I loved the taste of your cum by the way." She said this so nonchalantly that his face immediately went bright red. And by the time he wanted to respond she was already out of the room.
*****
As Jason stepped into the kitchen where his mother and his sister were eating breakfast. His mother stopped and said to him, "I already told your sister that I am going to be out with my girlfriends this afternoon and going into the later evening. I won't be back until about 11. I am going to be leaving some money on the counter so you both can pick something up to eat."
Jason nodded as he had a mouth full of food. Then he nearly sprayed it all over the table when he looked over at his sister. She had this seductive/evil look on her face and winked at him. 'Holy shit, what is she planning now?' he thought to himself. This thought put him into a strange trance and could barely here his mother talking to him.
"Jason? Did you hear me?" she said to him sounding annoyed.
"Sorry mom what did you say?" he responded.
"I said you two need to behave yourselves while I'm gone." his mom said sternly to him.
Immediately Jason was afraid that his mother knew something about the previous night. "What do you mean?" he said nervously.
"You two never really got along, that's why I was so nervous about having you share a room," she said.
"Oh, nothing to worry about mom, we've matured. I won't misbehave, I promise." he said more calmly now that his fear was dissuaded.
*****
A couple of hours later, just as their mother left, Jason found himself getting out of the hot shower he just had. As he was drying off he saw the door to the bathroom swing open and there was his sister.
"Rebecca! I'm naked, you need to knock next time." he said.
"Why?" she asked, honestly shocked by his tone.
"Because we're siblings, we aren't supposed to see each other like this," he said without regard of how this might affect her.
Then he immediately regretted his words as he watched his sister's brown eyes well up with tears as she stormed out of the bathroom and into their mother's room. Locking the door behind her.
'This is for the best,' he thought as he walked back, now clothed, into their room. 'We could never have that kind of relationship. It's taboo, society would frown upon it. Not to even mention what our mother would say.'
*****
Meanwhile in the other room, Rebecca was crying into her arms. Her brother's words had pierced her like a dagger. Especially after their previous night's escapades. 'Why would he say that? He seemed to enjoy it last night and this morning. What changed?' She thought to herself.
Another hour passed and it was nearly sundown, both of them haven't come out of their respective rooms yet nor seen each other. However, both started to become extremely restless. Rebecca was restless because she was worried that she just ruined her relationship with her brother. Whilst Jason was restless because he was reflecting his feelings for his sister, and that there was something more than just siblings.
It seemed like in no time after that, where both decided to go talk to the other. Jason walked up to his mother's bedroom door, as Rebecca did the same from the other side. Jason reached to knock when he heard a click and the door swung open. There stood his sister as beautiful as ever, looking up at him with worried but hopeful eyes.
"J..."
"Becca..."
They said at the same time. He paused to let her speak. "You go first," she said nervously.
