I live in my parents' house and my relatives come back to visit during the long holidays. My niece has come back for the first time in years. I was surprised at how cute she has become! We were having fun talking about old times, and I was reminiscing about how we used to hide and play in the closet, when my niece invited me to go into the closet! I couldn't help but stare at my niece's defenseless panties and her grown-up body, and I got a full erection! Of course, she found out about my erection and I thought she would get angry, but she actually got horny when she saw my erect penis! And then...