My girlfriend absolutely won't let me do it without a condom! Even though we've been together for a while, she still says no to doing it raw... As I hunger for the sensation of unprotected sex that I imagine will happen someday, her older sister, with her big breasts, comes on to me saying it's okay to cum inside! I love my girlfriend, but I just can't resist this temptation! While I was going wild with her sister, squeezing her soft breasts, my girlfriend finally caught us! But it felt too good, and I ended up cumming a lot inside her sister!