Having fucked Pepper, drank from her and Lilith and now eaten her pussy his primal need was to brutally rape her followed by inseminating her so she could heal. It was an uncontrollable urge that was their natures. His fathers species lived to reproduce and when mixed in a human that meant constant fucking. The brutal sex was his heritage as was the girls ability to live through flesh rending copulation. So his urge was the normal course for him. Every fiber of his being wanted to eviscerate Pepper and decorate the walls and ceiling with her. She would then mature to the next stage, adult woman and with child. The only problem was she was already with child and not just any random fuck-toy. When he drank Sis dry, her essence was infused in him. Sis was able to push him to hold her until Pepper was near. Her influence led him to mate with Pepper early. Sis would be reborn from her daughter, but only if her daddy and lover could elevate Pepper without killing the fetus of Sis in her womb. And he was almost ready to bore into Pepper, destroying her womb.
Pepper was crawling away from him and he grabbed her ankles. She was still trying to crab-walk as he raised and spread her legs wide. Her exposed, raw vagina glistened as her crotch spread. He could smell her sweet meat. His cock was poised, hard and ready. Kneeling behind her, he pulled her back impaling her gaping mutilated vagina with his over-sized cock. Her screams of pain were music to his ears and he entered her womb without resistance.
"Oh daddy, it really hurts. Make it stop hurting. Your creamy pee will make it feel better. Please daddy."
He paused to relish her fear and pain, "All in good time baby. But daddy has some fun stuff for you first."
He gripped her ankles tight and readied to rip her belly out spilling her guts with a vicious fucking, but he froze. Deep inside Pepper, a tiny human, only a few cells, touched his penis. In his head he heard "Fill her womb with all your seed my love. Bathe me in your strength that I can be with you again. Restrain your urge to rip out Pepper's womb and I promise you will wake to have me in your arms. "
She was gone again. He was clear-minded and tears were flowing from his eyes. His body ached to butcher the child on his dick, but his heart yearned for Sis more.
A great calm came on him and he gently stroked in Pepper. His semen flowed into her in hard gushes and he kept it flowing until he was empty. She was almost in a drugged state. Her belly was larger than Lilith's. It took fifteen minutes to fill her but only five for the cum to be absorbed. He knew he could not destroy her womb but it needed to be torn that she could mature. He gritted his teeth and with enormous self control, pushed himself through her uterus and popped out her belly with a squirt of cum. It was dreadfully slow and painful for Pepper. She was bawling pitifully while he was tearing though her. He pulled back in and managed another shot of very thick goo.
He stood with her still attached and he carried her to the bed. Poor Lilith had just given birth and was nursing. He laid Pepper beside her and with his last bit of strength, gathered Sis corpse. He placed her on the woodpile wrapped in a sheet and lit the pile. He watched her consumed by the flames and almost made it to his bed, collapsing in the hallway...