Step Sis Ruining No Nut

Your step sis finds out that you're trying to do No Nut November and she wants to ruin it, so she puts medicine in your cup to make you hyper sexual and hard all the time. You're confused why you're so horny, then you walk in on your step sis half naked just out of the shower! She decides to tell you a pervy nasty story about fucking some random guy last night!