Step-Sister Caught Trying Libido Enhancer

I assume my step-sister planned to use an enhancer like Spanish fly to ensure she felt well while out having a great time at the club tonight with her buddies. She was unprepared for the rush she was going to experience, but I suppose she wanted to try it out before using it at the club. As soon as she grabs it, I watch her dash into her room, so I follow her and see what she is doing. Melody starts to hump her pillow after taking off her clothing and sighs as if no one was home. She was horrified when I had to walk in on her, but she immediately seemed delighted to see me. Melody implores me to fuck her, stating that she must now feel my presence inside of her. She keeps trying to get me to fuck her no matter how many times I say no. She is so hot that it didn't take much pressure, but as soon as we were through, she threw me out of the room and said she was done with me.