It was a rainy Saturday morning and I had gone to visit my friend Barbara at her house. Her parents had gone to the lake and nobody else was home except her sister Annie and a maid. I was twelve years old and so was Barbara. We were playing Monopoly on the living room carpet, and I was having a very good time. I was laying on my stomach and from this position I could see between Barbara's legs as she sat cross-legged on the other side of the board. She had her short skirt pulled down between her legs, but as shw would twist around to pick up the game money or the dice, her skirt would hike up enough that I could see up her legs to her cotton panties. Because she was cross-legged, the panties were stretched tight against her genital parts and I could plainly see their outlines against the thin cotton. I thought that she was letting me have glimpses of her secret places on purpose, and this idea, along with what I could see, had caused my penis to become erect and hard. Because I was on my stomach, I could roll my hard penis against the carpet, causing the most intense sexual pleasure.
Then Barbara's sister Annie walked into the room, interrupting our play and making me madder than hell. At first. Annie sat down on a chair across from me, and I had to look at her. She was fifteen years old and she was wearing short shorts and a tee shirt with no bra. I could see her nipples,standing up a little under her tee shirt, and I could see a nicely rounded mound between her legs under her shorts. I noticed all of that but she was too old for me, and I didn't like her anyway. Then Annie began talking to us, saying that Monopoly was a 'kid's game' and not something that she did anymore. When I asked her what 'adult' things she was doing, she replied that she would show us something that we didn't know, telling us to follow her out to the garage. I could not imagine what we were going to do in the garage, and I was even more surprised when she told us to get into the back seat of the Buick sedan that was parked there.