He told them to ride him.

"What if you girls fuck me?" Frank chuckled. "Is that okay, doc?"

Katy bit her lower lip as she stared at Frank's thick veiny erection saluting her like a patriotic flagpole. She was feeling conflicted between her medical professional oath of protecting her patient and her growing hunger for his cock.

"Well, if he had a heart attack at least he'll have both Dr. Roberts and me to save him!" Lindsey giggled as she stood over him.

"Um... okay," the redhead nodded reluctantly. With the doctor's approval, the blonde nurse lowered herself down Frank's massive shaft until she sat on his balls.

"Ride me, cowgirl!" he chuckled, slapping her ass playfully to get her to start bouncing up and down. Frank reached up and cupped her huge tits to prevent them from jiggling violently.

"Hmmm, fuck yeah!" the nurse purred as she gyrated on his cock. It didn't take long for her to climax and she flailed her long, golden mane around as she screamed in orgasmic bliss. However, before she could collapse on top of him in a post-climax denouement, Lindsey was unceremoniously pushed off of Frank by Brigitte, who eagerly speared herself with his cock, slick with mixed female juices.

Frank grabbed her tiny waist to help her piston on his thick shaft that was stretching her tight cunt. She mewled while her orgasm built up and when she finally came her hot velvety sheath was immediately replaced by the doctor's soaking wet pussy.

Katy squatted on his cock, dangling her large breasts over his chest. She closed her eyes as she moved her hips to get his cock to rub against her sensitive g-spot.

"Come for me, Red!" Frank urged the doctor.

She whimpered as she increased the tempo of her ass slapping down his thighs. "Oooooooh GOD!" she screamed as her orgasm overwhelmed her.

Frank thought the girls would be worn out after that but they were craving for more of his cock. They impatiently took turns riding him, bringing themselves to more orgasms, until he finally felt his balls about to burst.