Offer to suck him off

You clench your still sore ass and knit your brow at your brother. "No way! Not this time! Just let me suck you off real quick and I'll be on my way."

He glares back at you, still approaching with the key. "No way, Sarah. You suck me off every single night. If I have to feed my fucking sister two doses a day, it's gotta be something special."

He's right. You spent the better part of most nights on your knees trying desperately to get your brother's attention beneath your brother's extra high computer desk while he dicked around on the internet or played video games. You especially dreaded whatever a "raid night" was. Hours of sucking a distracted limp dick was what it was to you. You sucking him off wasn't exactly an incentive for him. But luckily, you had plenty on him today.

"Look asshole, just let me suck your cock real quick and give me the keys and I won't tell mom and dad you taped yourself wasting a dose on me last night. AND that you tried to piss in my mouth in the shower."

Pete curses silently to himself. He must have thought you were an idiot to not notice what he was doing before he closed it. But it wasn't like you were demanding a lot. And it wasn't like you had insisted he be nice about it. Not that it wasn't your hope.

"GOD. Fine! Come on!" He huffs down and sits in his computer chair, still jerking his cock. You slip under the desk and assume your usual position under the high clearance desk and slip your brother's cock in your mouth. Again.

Your parents bought the special desk as a present to "both of you" for Christmas last year since you Pete kept slamming your head repeatedly under his more cramped previous desk during your nightly dose, causing frequent bruising. It hasn't really helped much, but your personal modification of a pillow hot glued to the underside of the desk where Pete tended to slam your head when he came made it slightly more bearable.

You get to work sucking his cock while Pete got to work ignoring you. You hear the click of a mouse several times, then hear the sounds of slapping meat and what appears to be your own muffled screaming. Guess he figures you just know he's taping you and don't care. What an asshole. You almost want to say something, but the porn is keeping him far more hard for your attempts at sucking him off. You deepthroat him several times, but mostly bob rhythmically on what fits in your mouth.

Pete makes more clicks and you hear more of your screams, often the same ones being repeated several times in series with very little break in between. Is he making a compilation of your **** while you suck him off?

He pauses his clicks during a rather lengthy and drawn out muffled scream and puts his hand on the back of your head to **** his cock down your throat for 5 seconds while he mumbles, "what a fucking stupid bitch," under his breath without taking his eyes off the screen. He releases you and returns to clicking while you resume sucking, **** slightly as you return to rhythm.

You notice Pete starting to throb more in your mouth, a tell tale sign of the merciful end to your torment, as you hear your muffled screams all being played back in rapid succession. You've had your brother shoot enough loads in your mouth by now to know when he's about finished up. Finally. You bob faster and put more energy into your work as you get excited to be almost done with your chore.