Fuck her right in the...

I sunk myself deeper and deeper into her. I felt every muscle in her ass wrap around my dick and massage the cum out of it. I was in heaven.

I was half way in when I gave a forceful thrust. She moaned, almost screamed in ecstasy. She was just like a cat in heat.

I stayed buried in her for a moment, and bent over to nibble on her ear. The reaction I got was immediate. She moved her ass around furiously in an attempt to create any amount of friction. I decided to give her what she wanted, so I stood back upright and started thrusting. First slowly, allowing her to get accustomed to the foreign intrusion, and then I sped up.

I was relentless, I was merciless. I pounded her so hard that my mother could hear the smacks of her ass slapping against me as I fucked her. I heard my mother moan loudly in the other room, obviously pleasuring herself. That fueled my lust even more, and I began to pound her even harder.

"I'm going to cum!" I yelled, "I'm going to cum all over you!"

"Yes please! Please Josh!" Lilith shouted back.

I kept fucking her until I was at my peak. I pulled out and started to jerk myself off onto Lilith's back.

I came so hard I screamed, and I came what seemed like gallons of cum onto my sisters back. When the onslaught was over, I took a step back and sat down. I was fucking tired, but happy nonetheless. The world was mine.