Kylie uses her sister's phone to text a guy to come over. He's surprised to find that it's Kylie waiting for him under the covers and not his actual girlfriend, but that doesn't stop him from sticking his cock in her mouth. We don't blame him. Kylie is practically begging for it. And what guy hasn't fantasized about his girlfriend's sister? Kylie wants to suck cock better than her sister so she bobs her head up and down, taking this guy's big dick as deep down her throat as she can. We don't know how her sister fucks, but with Kylie's tight, horny pussy we bet she gives her sister a run for her money.