Poking Pervert

This happened in Mexico. I was on a subway with my family and I was 16. There was a middle-aged guy standing very close to me and he seemed drunk. He kept inching his way closer and closer to me until I could feel his erect penis against my hip. I looked over at my brother in horror and he moved in between me and the guy. I can't imagine what I would have done if I had been alone.