Fuck her from behind?

"I want to fuck you from behind," he told Clara.

"Oh, do you now?" she smiled. Then she stood and turned her back to him. She leaned over a little and shook her cute, wet ass at him.

The Doctor stood as close to the tub's edge as he could and guided his hard cock up to Clara's pussy from behind. He pressed his cock head against her wet, waiting sex and slowly pushed it inside her. Clara moaned and her legs shook a little as he entered her. He was very slow at first, looking down to watch his hard rod enter Clara's pussy as he grabbed her hips.

It felt so wonderful! Clara's pussy was hot and wet and held his hard cock tightly inside it. It was soft and creamy and the sensation it created all along his length drove him mad with passion. He picked up his pace until his body was slapping into her bottom as he fucked her hard from behind.

Clara moaned and squealed and they were sounds that the Doctor had never heard from her before. She was a completely different woman in the throes of passion (as were most women he assumed).

Again, after a few short minutes of this, he could feel a huge orgasm building within him.