They should fuck.

"I'm going to ride you, Vance," Clara said, pushing him down to the floor. She straddled him and then turned around on top of him so that her back was to him, reverse cowgirl. She reached under herself and took his hard cock into her hand. She guided it to her wet pussy and then lowered her ass onto him, taking him all the way inside her.

The Doctor moaned as he entered her and he watched her amazing ass bounce slowly up and down on him. He lay there and let her ride him, picking up speed until her ass was slamming into him hard with each downward thrust.

Clara leaned far over and her ass bounced up and down and up and down and the Doctor watched as his cock slid in and out of her hot little pussy. Her ass shook as she made herself cum while riding him and her bouncing ass jerked and jiggled as her orgasm took hold of her.

The Doctor's hard cock was going to explode.