You both start awkwardly

You both start awkwardly stroking, but get more comfortable as time passes.

"Nice job picking one with (favorite porn star)" She whispers breathily.

"Dude come on I'm trying to focus." You retort.

"Would you relax? It was a compliment," she says annoyed.

"Just hurry up and finish." You reply.

"Haha. First time I've heard that from a guy." She giggles back at you.

"I'm not a guy I'm your brother." You inform her.

"Yeah you're my cute baby brother, and don't forget it." She continues to mock you.

"Don't make me flick your balls." You threaten.

Her legs cross instinctively and she exclaims, "Oh heavens me anything but that I may just die!" in a southern belle voice.

"Fuckin weirdo. I should have guessed you'd be a masochist," you say in response.