'Masturbation'

You spend hours cleaning and tidying Sarah's apartment, which is thankfully not overly large. The only 'break' you get is to cook both of you dinner about halfway through.

As evening rolls around, while you're making Sarah's bed, you hear the sound of sex filling the small apartment. It startles you for a moment...you're pretty sure it's just Sarah and you in here, but the sound is unmistakably that of a man and woman fucking enthusiastically.

You realize upon exiting the bedroom that the sounds are coming from the TV. On screen, a man and woman - porn stars you presume - are going at it with an impressive degree of intensity. It doesn't appear to be any kind of 'fetish' porn, but it's a lot rougher and wilder than most scenes you've watched.

On the couch, Sarah's down to some revealing black lingerie, and the panties are pulled aside so that she can play with herself, though she looks to have just started.

"Figured that'd have you running in here. I was about to call you in anyway. Get your dick out."

You freeze for a moment, staring, before you hurriedly pull off your pants, your dick stiffening before you can even get it free.

Sarah turns her head away from her porn to study you critically for a few seconds, then shrugs. Her legs spread a bit further apart.

"It'll do. Come put it in, but don't block my view."

Your voice cracks slightly from excitement and nervousness at the sudden order. The command really has you on the spot, since you doubt she's any easier to satisfy in bed than anywhere else.

"Y-you want me to fuck you?"

She snorts as if you've said something ridiculous. "You're just helping me masturbate. Now hurry the fuck up."

You swallow and step closer, intimidated so much that you shake a little as you clumsily climb into position, taking care not to block Sarah's view.