Well the story is that I saw my 21 yo stepdaughter standing outside the bathroomdoor and peeking in via a mirror in the bathroom while I was having a shower. She pretended to do her hair in front of another mirror in the hallway while she was wathing me beeing naked in the shower.

I think her mother had told her that I have a big cock (you know how girls are) and she wanted to see just how big it was. I had caught her looking at my croch several times. Well she stood there peeking in / starring and I got horny and thought I would show her how big my cock is in erect condition. I stroke my cock so it got bigger, hanging down heavily and placed myself in a good position so she could get at good look at it. Then I soaped myself in, all over the body and also my big cock, which were growing. And she just stood there starring at it. It was so naughty and horny. I stroked it so she could see it and I placed myself so she could see it in profile pointing right up the air.

I didnt cum in the shower because I wanted to keep it big. So when I finished showering I dryed myself with a towel (when I shut down the water she went away). When I had dried myself I wraped the towel around my waist my cock still half erect and thick. And I went out in the room where she lied down on her bed while she talked to me. When I came out she starred at my cock behind the towel and suddenly she was quiet, she just starred at it. I walked a little around the room without saying anything (I was also very horny). Then I placed myself just in front of her and pretented I wanted to set the towel right. I loosend the knot and revealed my cock for her, just one meter from her face and her eyes that starred at it. She moved her blanket and I saw she the green see-through panties on and I saw her shaved pussy pressed behind the panties. She sat on the edge of the bed and spread her legs wide open. Still not saying anything. I was so horny that I didnt think of the consequences. I went on my knee and approached her. My cock was now between her legs, which were wide open. I smiled at her and she took her hand and moved the panties aside....