Hey, remember that time I sucked your cock? I told you I'd take your virginity and that time has come. So what if our 'rents are downstairs? We'll be quiet! I know it won't take more than me taking my top off to expose my cleavage for you to cave in. I look SO good and you want to fuck so bad for the first time that you don't even care if I'm your sis. I start you off with an eye-contact blowjob, slurping your hardon. After a bit, I slide off my black thong and start to slowly ride you cowgirl style before putting it in reverse so you can see my ass bounce. As a special gift, since I know you LOVE these big boobs so much, I finish you off with a titjob so you can see your cum all over my cleavage. God, virgins are so horny they'll even fuck their sisters!