He had to get to Sis quickly. Lilith, in her first act of lust with him needed so much of him to recover. She instinctively bit off the tip of his cock, not only devouring it but drinking down his cum and blood. The experience was so satisfying at the moment, he let her drink herself to sleep. Now he was faint and losing blood fast. He rushed into his mothers room interrupting mother and daughter as they neared climax together. They caught him as he fell onto the bed and Sis held him like a baby. She guided his mouth to her nipple and he suckled it. Two gulps of her milk and his bleeding stopped. His glazed eyes looked at her and she said softly,"Go ahead, sweetheart" She pressed his head into her breast.
Sis let out a stifled scream as he bit down around her nipple. Blood and milk ran down his chin as he chewed and lapped up her fluids. He swallowed and fire filled his belly. He continued into her breast, taking mouthfuls, ripping the skin and digging deep into the fatty glands. Her screams were terrifying to her mother and she reached to him to stop him, but Sis hoarsely yelled, "No, he must do this."
Her left breast gnawed down to a stump, he paused to breathe. The raging fire in his belly was still hot and he growled like a hungry predator. He knocked her onto her back and savagely attacked her right breast, tearing and gnawing until it too was gone. He felt his penis burrow into a warm wetness and he slid into her. His semen spewed into her and she wrapped her arms and legs around him. He was more animal than human at that moment and as she kissed his rigid ejaculating body, she was thankful he was safe. She looked at her mom and giggled. Mom's eyes were wide in terror and yet she was in mid orgasm, fingers up her twat and squirting, watching them.
Sis knew her brother needed to recover so she left him to check on Lilith and give herself time to sport new boobs.
Alone with her son, Mom moved close to comfort him. She saw his dangling cock, now whole again and without thinking she grasped it to inspect his condition....