Guilt and pleasure
I'm a 54 year old mother of a 23 year old son. He came to stay with me after college unti he landed a job. It's just been me and him for seven years. I will admit that I have had passing thoughts about whether or not he is well endowed like his Dad. His father has a large cock. It's over 10' and quite thick. I never had any thoughts other than that and certainly none that involved anything sexual. That is until one day.
I was bringing towels to his room and I could enter the bath from the hall. His bathroom door was a jar and I could see in. The light wasn't on in the bath so he couldn't see me. Just as I looked in, he was taking off his underwear and out came his cock. Oh my God. It was flacid but I knew it would get big. He walked over to his computer and started running videos of mature women. He took a hold of it and started stroking it. It began to grow and get hard. Oh my God again. I have to say. My sons cock was huge.
As I watched him jerk off, I got hot. I kept telling myself I shouldn't do this, but it was hot. He would buck his hips and would jerk it with long strokes. My sons cock was 11'. I couldn't help it. I stuck my hand down my pajamas and put in two fingers. I was soaked. This was so taboo. I watched him and fingered myself for at least ten minutes. He was going to cum. He shot out this thick load, then another spurt and a third. I started to cum. I stuck three fingers in deep. My own son was coming in front of me.
I watched him a few more times until he moved out. I have masturbated about his cock several times and I have not told anyone.