You need to relieve some stress in private.

It's very odd how clingy and eager to get into your business Abbie is acting today. You usually get along fine with your older sister. She's more outgoing and free-spirited, so she often teases you a little about being a shy virgin, but she's never been this touchy-feely, or talked about getting you laid so bluntly. It's making you a little uncomfortable. On top of that, you've still got a lot of nervous energy from finally getting up the courage to talk to Tracey. Jerking off would burn off some of that energy, and help clear your mind. But, you won't be able do that with Abbie in your room going through your clothes.

"Um... yeah, that sounds great, but we've got hours, right. I should get some homework done first." You tell her, unwapping her arms from around you. You grab an apple from the fridge, and head towards your room. "Give me an hour or so. Once I finish my work, then you can play dress up with me, I guess. I'm not sure why you're so into getting me girls all of a sudden." you add in an ironic tone.

"Someone's got to be, Beanpole," she calls back as you head up the stairs. "If I left it up to you, you'd never make a move, and all female-kind would be deprived of you."

You close your bedroom door and wake up your computer. You open some schoolwork on the screen, to be able to switch to it, in case Abbie walks in. Then you start browsing around your favorite sites for porn. Your encounter with Tracey put a craving for a lesbian scene in the back of your mind. You slip on headphones, so Abbie won't hear the sounds of any videos you watch.

You poke through a bunch of thumbnails and descriptions. Sampling one or two of the girl-on-girl videos, but none of them appeal to you. You decide to check out MFF threesomes instead. Now those grab your attention. You find a scene where a guy has a slim blond and a petite brunette worshiping his cock, then eating each other's pussies while he rails them. It ends with them sharing his cum with each other in a long, sloppy kiss. Fuck, it's hot. Your cock is aching as you watch them licking cum from each other's faces, then kissing hungrily. You're so close to cumming, it almost feels like your rock-hard shaft is vibrating.

Usually, during the day, with someone else in the house, you'd go into the bathroom and lock the door to masturbate. But this scene is so hot, you'd love to cum while you watch it.