I find my rhythm in her ass, my cock sliding in and out of her violated hole, each thrust working her open a little more. Her screams fade into low, broken moans, her body shaking under the assault, taking it because she has to, because I told her to. The twins watch, transfixed — Dana's hand idly stroking her own cunt, Gina's fingers slick with lube from her mother's ass — both of them breathing fast.
I drive into her harder, my pace quickening, and Mary's cries pitch up into desperate yelps, her body shaking under me, pushed past pain into something raw and animal. My balls draw up, tightening, and I feel the familiar pressure building at the base of my cock. "Mary," I grunt, gripping her hips, "I'm going to fill your ass."
