And then there was Lilith, his youngest sister and also daughter by his mother's womb. Conceived by theft, his mother used his spilled seed to fill her need. As Pepper was shy and innocent, Lilith was rebellious and wanton. She usually slept with their mother and more than once, when he and his older sister were not going at it, he could hear mom and Lilith moaning and groaning as they pleased each other.

After he literally fucked Pepper's brains out and she had recovered and fed, he washed her in the shower as she slept in his arms. Cleaned and dried, he laid her in her bed and went to his own room. He wanted his dear sister. He wanted to....
As he entered his room, he saw Lilith on the bed. She was wearing her favorite white dress.
"Sis and mom are going to have a girls night tonight, and I thought we could talk", she said as she adjusted her skirt to reveal a little more thigh.
"Sure Sis. What's on your mind?"
She smiled and started,"I saw what you and Pepper did today. It was awesome. It really made me wet down here. Mom explained why you did that." He noticed her staring toward his bulging jeans, "But what I really wondered is do you think I'm just as pretty as Pepper?"
He could see where she was going, "Lilith, it's not about pretty. Pepper was dying because she was developed sooner."
"But we're the same age, and I was born before her."
He sat on the bed beside her, "There's more. Pepper is a full mix of human and dad's race. You aren't"
"I have the same mother as you and Sis."
"Yes Lilith, but dad was not your father. He was your grandfather. I am your father. So you are three quarter human."
She was scared, "Then I'm not able to be fucked by you!"
He was shocked slightly by her candor but then, mom had been slutting her up. Then it occured to him, she might be fun to have a go at.
"Now don't worry about that, you see Sis is also my daughter." Lilith gasped and then giggled.
"Way to go bro'. I mean dad. I mean...well this is what I mean..." and she pulled up her skirt and drew up her knees, spreading giving him full view. He had to admit, her mound was delightful and she smelled of citrus.
"Mom says it tastes and smells like oranges. Do you like oranges?"
He didn't hesitate and in moments he was drinking orange juice.....