Little Sister is Obsessed with You

Your little sister can be a bit.. weird to say the least! But lately she's been REALLY weird.. like she's becoming sexually obsessed with you. Your girlfriends don't stick around because your sister is so fucking CLINGY all the time! Whenever you try to have an intimate moment with your girlfriend, your sister is there, by your side like an annoying, cute, sexy pup. You know that she wants you, but its morally impossible.. she's your SISTER.. will she ever get the message?