My mother in law is visiting right now and has been here about a month now so having a jerk as often as i like is almost impossible. Thankfully she spends a lot of time watching the tv in her room leaving me alone to at least be able to look at the site. Yesterday I had been looking at everyones pics and vids for about an hour and rubbing my hard cock through my jeans. I could feel a good cum getting closer when ma came out to the kitchen to get something to drink. I turned my laptop so she couldn't see what was on it and also had it covering my lap so she wouldn't know what I was doing. As she was getting her drink the cum arrived making a huge mess in my underwear and jeans. I hadn't had an orgasm for a couple weeks so there was a lot of it. She decided to sit down and use her laptop so I had to wait about an hour for her to go back to her room before I dared get up to get cleaned. I've been wondering if she could tell, by the smell or whatever, what happened.............