After college I moved back home to be close to my family that I missed. Things had really changed while I was gone. Ann is a junior in High school and Beth is getting ready to go off to college. Beth has been staying with my parents while my brother Mark and his wife where in France. I know I should have called out when I walked in the door or even rang the door bell, but I used my old key, I walked up stairs to my old room because the ride back home was long and I was very tired. As I walked down the hall I could hear music coming from the spare room down the hall from mine, I knew that my niece was staying in that room so I thought I would say hello, but when I got close to the half open door I could see Beth dance across the room in a very sexy white cotton bra and panties. I wanted to turn and walk back down the hall to my room but I was frozen where I stood. Beth was no longer the skinny little pigtail girl I knew when I left for college, she was taller and had filled out to more sexier then any girl I slept with in college.
Two days later I came home after going on a job interview and the house was very quiet so I thought no one was home so I went up stairs to change out of my suit and into something more comfortable. As I made my way down the hall I again heard music coming form Beth's room so I quietly made my way down the hall in hopes of seeing another show. Again the door was half open and there was Beth dancing around the room in just her bra and panties but the set she had on today were very tight and really small and they really showed off her figure. As I stood there and watched my eighteen year old niece I couldn't help but feel my cock getting hard, I thought she saw me standing there rubbing my hard cock through my pants, so I quickly made my way back to my room and stroked my cock until it exploded to the picture of my niece in her sexy bra and panties.