My sister is always horny and watching porn. Let's see what she's watching today. She tries to lie and tell me that she's not even watching porn but I know you sis, what is it? "Blowjob video" she replies with that adorable smile. I ask her if she likes giving blowjobs and of course she does, especially to her big bro! She pulls my cock out and starts sucking it just like a fucking pornstar!!! Courtney takes me deep down her throat, keeping me there so I can feel every inch of my cock inside her mouth, just like a good sister should. Fuck her mouth feels so good...and the way she uses her tongue is just amazing. I want this to last forever but hell it feels too damn good, I ask her if she wants me to cum in her mouth and she looks up with those beautiful green eyes and says "I want my big brother to cum in my mouth." I give her a mouthful of cum just as she had asked for. She cleans up the bit of leftovers off her chin with her finger and looks me in the face as she sucks it clean.