Terror

Matt could tell his twin sister didn't want any part of their dad's cock. Somehow, their dad had started **** Lily, and their mom knew about it. Knew she didn't want to have sex with him, butt allowed it to happen! He heard movement in the hall, then the heavy steps of their dad walking down the stairs, He opened his own door, verifying the large shape of their dad was descending the stairs, and walked toward his sister's closed door. Not wanting to make a sound, he slowly opened the door and slipped inside, closing it carefully behind him.

Lily lay on the bed, curled into a ball, her skirt still rucked up to expose her long legs, and the barest hint of her pussy between her thighs. Matt crossed the room and lay behind her, a comforting hand on her arm as she startled at the way the bed settled down with his weight. "It's just me," he murmured.

"I... I have to... I have homework I have to finish," she mumbled, trying to roll away. Matt held her to him, her struggles weak in his arms.

"How long has it been going on?"

"How long has what been going on?" Lily struggled again, and Matt could hear the nerves in her voice.

"How long have you and dad been... I mean, how long has dad been..."

Lily turned her head, looking back at him. "You know?" she whispered.

Matt nodded. "I heard a noise, and when I peeked in, I saw dad... well, he was pulling out... I hid until he went back downstairs." Matt didn't think it would be a good idea to mention that his mind had been inside his mom's body at the time.

Lily turned her head and stopped struggling. "Dad's been coming into my room since our birthday. Right after everyone left, he came in, closed the door and said I was growing into a beautiful woman. I was flattered until he started taking his clothes off. When I asked him what he was doing, he just told me I was a grown up now, and I would have to pay to live here. Dad **** me three times that night, but when I said I was going to tell mom, he would hurt her." She turned back to face Matt. "You can't tell anyone," she pleaded. "If mom finds out, I don't know what dad would do to her."

Matt paused before replying. He knew their mom knew what was happening to Lily - knew, but did nothing about it.