You went out tonight with your sister and your girlfriend. The crazy thing is that you were dancing on your sister all night instead of your girlfriend. It wasn't planned, it just happened. You're lying in bed thinking about how hot it was when she comes into your room. "Can I stay in here tonight?" She asks. She's still wearing her sexy dress that she was grinding all night on you in. She comes over and sits on your bed looking down at you sexily. This could be bad...