Watching my 18 y.o. stepsister all naked in bed play with her perfect young pussy was a fucking blast, but when she asked me to fuck her and finish her off I almost panicked. She is my fucking stepsister, you know, but that amazing tight hole with a tiny red bush above it was just too tempting and gave me too big of a hardon to ignore it. You bet I fucked her good and she made me cum in her mouth like I was her boyfriend or something, what da heck!