Seeing my precocious niece accidentally reveal her underwear and getting an erection, I couldn't resist playing all sorts of pranks on her that I couldn't do when I was a child. SW-122

Ten years later, my niece, now grown up, unsuspectingly exposed her underwear to me... I couldn't resist and said, "Uncle, do you want to play with that thing you used to play with?" When I was little, I could only put my fingers in, but now I should be able to fit my penis in...