In Katy's mouth.

Frank would normally be satisfied cumming in either of the beautiful women he had just fucked silly but he paid a lot of money to finally live out his sexual fantasies. He unceremoniously yanked his cock from the warm confines of the nurse's quivering cunt.

"Sorry, sweetie," he laughed, giving her a playful slap on the ass before climbing over the girls to stand over Katy.

"What..." the redhead began to ask before he lowered the tip of his cock, slick with the girls' juices, to her lips.

"Open," he grunted. She obediently did what she was told and her mouth was stuffed with cock. Frank grinned at the sight of the beautiful doctor bobbing her head up and down his cock, realizing she must have been worked up watching him fuck the other two girls.

The only hint that he was about to cum was when he grabbed the back of her head to hold her still so he could thrust a couple times before emptying his balls down her throat. He pulled her head back to let her gasp for air before sticking his cock back into her mouth so she wouldn't gag.

"Fuck yeah!" he groaned, pulling his still hard cock out of her mouth and collapsing on the bed.

"Oh my God, he's still hard!" Lindsey gasped.

"You should take it easy, Frank," Katy warned, wiping her mouth of his semen. "Xentrex is still an experimental ****. Your heart..."