POV you are my horny step-brother and I'm your hot n gassy step-sister. I am making my bed and accidentally get my hand stuck under the mattress. I call out for your help but you just come into my room and start grabbing my ass and trying to smell it!! I start farting to hopefully scare you away from messing with me and smelling my ass! its not working so I try farting even more...its still not working wtf! I start wondering if my panties are holding back the smell and if I take them off maybe the stench will finally hit you. THAT doesn't even work! I start to realize you might actually be getting turned on by my farts so I decide to strike up a deal with you. If you help me get my hand free I promise to give you all of the rest of my farts right in your face and mouth...you accept and become my fart slave so I can pay you back for helping me get unstuck!