He needs a little oral stimulation from her while he finishes in her tits

"Stick your tongue in my ass," he told her.

"What? N-no!" she managed in a shaky voice.

"It'll make me come faster," he said, and reluctantly Amanda leaned upward.

Her first attempts had Ross' ass drag across her lips and nose, but when he shortened his strokes as he felt her face beneath him and let go of her hands, taking over the tit-squeezing duty as she wrapped her arms around his waist so she could rock forward and back with his motions.

At last the two synchronized their movements and Amanda was able, with a grimace of disgust, to dart her tongue up against his asshole.

'At least he seems clean,' she thought, pressing against the tight opening.

Ross, a bi-sexual with plenty of experience, loosened his rectum, and to Amanda's surprise her tongue all but fell within him, making her nearly vomit in spite of the near lack of bitterness to taste.

"Oh God yeah that's it. Put it in deep. Deeper. Fuck, I'm cumming!" he exclaimed. and jammed his butt against his face as he began to ejaculate into her cleavage. Jet after jet landed in the middle of her tits, his squeezing hands creating a pocket.

After one last dribble his cell phone went off, surprising them both. He left his dick in her cleavage and his butt in her face. She sagged beneath him, letting her face hang down as far as she could from his toned buttocks. She'd spent hours admiring that butt in leather pants or tight jeans, she'd never imagined that one day she'd be licking it, and never wanted to.