Step-parents have gone out, and I decide for one last time I'll put on a show for you, in exchange for your allowance, especially after the amount of trouble I got in last time, when we got caught. Wearing the outfit you requested which barely covers anything, and sway my hips.. cant believe this gets you off, such a little pervert. You ask my to do the peace sign and ahegao face, such a weirdo for a little step-brother. Trying to avoid eye contact and laughing out of embarrassment, I carry on, you ask my to put my gstring on backwards, even though it doesnt really cover anything, then to get on the bed and spread my legs. Which makes my gstring pretty much pointless, so I take it off, revealing how wet I am. I lie saying I'm not turned on doing this in front of you. I spread my ass cheeks and wink my asshole. You ask my to finger myself, after the initial shock I do it... you're jerking... FUCK WE CUM AT THE SAME TIME! This is fucked, I cover my face in embarrassment.