You don't even try to hide the fact you stare at your Sisters ass when she's working out in her tight leggings! You just don't have the willpower to look away when her ass is jiggling about like that.. its so fucking hot (even if she is your biological Sister!) ..today, she tells you that she literally knows you wanna fuck her.. that you make it so obvious that you lust after her.. you can't even hide your erection when she openly teases you like this.. holy FUCK you can't hold back.. and then she offers herself to you (although she tries to act cool about it.. like its only because she feels sorry for you) and ends up sucking your dick! Just like that.. your Sister has her mouth wrapped around your cock and whats more- SHE LIKES IT! You then encourage her to agree to sex, which she does! Her pussy is so goddamn tight, you ain't even wearing a condom as you pound into her until you cum. Good job Mom and Dad aren't home, right?