Naked in front of mom

I used to do the same by leaving my door open a little so my mom would see me changing or one time, I was laying on my bed and she jumped back out of the room saying sorry. I asked her why she was so startled and she said she thought I was doing something (she meant masturbating) but I told her not just sat on my bed while I was looking for something in the laundry basket to wear.
Then I realized one night when I actually was jerking off that she could hear me because I had started using a better lube that made it sound really wet and our walls were a bit thin.
I knew as soon as I came out of my room because my mom couldn’t look me in the eye. So then I started moaning a little louder and even making it more obvious when I’d cum. Then, when I would come out of my room, she’d blush when she spoke to me. We never discussed it but it was a bit of a turn on to know it was so obvious to her.

I always left my door just cracked too when I was a teenager, like I had forgotten to close it all the way. This way, my mom could come in thinking it was ok. I used to take my time getting ready for bed or getting dressed.
She walked in a few times when I was totally naked and apologized and left but after a few more times, she would just tell me whatever she came in to tell me or do whatever she came in to do. Then for a long time, she didn’t come in much. When I was 19 or 20, I was home from school on break, I would do the same thing and she walked in on me naked a few times and once when I was jerking off.
I acted like I didn’t see her and even though I wasn’t quite ready to cum, I let my leg twitch a bit like I was about to cum.
She left but for a few seconds she was staring at my hand stroking my cock and I swear that made me cum so hard when she left.

I used to do the same and leave my bedroom door open to have a wank,without sounding like a big head I do have a pretty large cock and my mother came in unaware that I was wanking and just stood there and stared at me stroking my cock! Oops I'm sorry ill knock the door next time she said and walked out, I did this as often as I could and it became obvious that my mother enjoyed seeing me! Then she commented on how big my cock was saying I wish your dad's was like that! I like it when you are here mum, want to see me cum? Be quick about it then your father may come upstairs, im going to cum I said, I shot the biggest load of cum ever! Oh wow sweetheart that's a lot of cum,

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17 yo son of 40 yo mom: I was about to take a shower and just started to wank when my mom suddenly entered the bathroom to pee. She stopped for a moment staring at my erect throbbing cock. She volunteered to give me a hand-job saying 'let me help you'. It was so ecstatic that I never imagined a woman's hand on the cock would be so enjoyable. Intuitively my hand went to her boobs as I came in her hand - she lapped all the cum and hugged me tight for a few moments. We had shower together for the first time and many more in later days.

Mom use to wake me up by taking off the blanket and rubbing my legs. Once putery hit started sleeping nude. She found out one morning taking off the blanket and saw my morning wood. She gasp and woke up to her staring at it. Tried to cover it up when she said it's okay it's something to not be ashamed of and meant I was becoming a man. She sat down and asked to see it. She said I had grown since I was little. Taking my cock in her hand she pulled down exposing my tip. Saying she was checking if I was washing it right she gave me a few strokes before she stopped. Apologizing she said she shouldn't do that and that I should be. Grabbing my cock she watched me start jerking. Looking at her I got wet fast. Picking up speed I grabbed my balls and started to cum hard. Catching it in her hand she said that was a lot and gave me a taste. Smiling she said get in the shower and come down for breakfast.