Plank

It's better to err on the side of caution so you lift yourself up into a planking position. She lies back and closes hers eyes.

"Go for it," she moans.You keep licking away, honing in on her clit now. Every now and then she moans a soft order telling you to do a push-up or a plank but she's really leaning into what you're doing. Your tongue starts to get tired as you lick, poke, stroke, flick and even trace letters around the top of her vagina. You push on until you feel her start to shake.

"Keep going, keep going, don't you dare stop!"

You follow your trainer's instructions and keep your face buried and tongue busy on Gwyneth's cunt. Suddenly her legs wrap around your head and she shudders, crying out in ecstasy. Even as her grip tightens you don't let up, pushing Gwyneth all through her orgasmic high. After what feels like an eternity you start to let up and her grip loosens.

"That wasn't bad," she tells you, looking up at the gym clock. "Time's not up yet, next position."