I pressed the tip of my c**k forward. I felt Jenna's tight asshole push back. I pressed a little harder and suddenly squuuuiiiip I was balls deep in my baby sister's ass. She let out a howl that couldn't be pleasure, but definitely wasn't pain.
"Oh ffffffuck!" she said.
I was so surprised at how easily it had all gone in, I almost fell forward. Grabbed at Jenna' thighs to hold me steady. I straightened up, my d**k head-to-foot in the skinny brunette's butt. Jenna's body shifted back and forth slightly, and I realized that was Brianna, now jamming her twin's c**t for all she was worth.
Jenna was gasping. Breaths coming in great gulps. Every exhalation she cursed and cried. "Oh God. Oh f**k. Oh God."
"Jenna are you OK?" I asked.
She responded with a low groan that -- as unexpected for h
