I walk in my room, pleased to see my bro, but then I realise he's doing something with my thong! I don't know what to do, I snatch them away and expose his hard bulge. I can't help but be a little turned on. I roll with it and admit I have some weird kinks and would love to make a deal. He can do things with my underwear, maybe even me, if I can explore my fantasies. Our little secret. He agrees so I tell him to put the thong on. "You look so pretty in your step-sisters thong". I tell you to stroke it as I fix my strap on and watch your nervous face as I get prepared. Eventually, I line my cock up with your tight little arsehole and watch you play with your cock. I penetrate you and toss you off at the same time. You cum, hard! I can't wait to see you at the breakfast table.