It was the hottest, humpiest, tit-swingiest, girl-on-girl action I've ever witnessed. My daughter's scissoring, grinding, and pulling at each other on Kimmy's bed. I stood in their bedroom doorway, my throbbing cock sticking out of my boxers as I watched. Kat's eyes shut tight with her mouth agape, making guttural moans of ecstasy.

Kat smiled as her eyes opened, seeing me at the door, stroking my cock. Her pleasure heightened from being watched. Kat pulled Kimmy tight, locking their twats together as she came.

"Happy Birthday, Daddy. Come join us," Kat called.

"Yes, Daddy. We've been waiting," Kimmy added.