Alright, I finally have something to contribute. My mom was upstairs, and I was downstairs on the couch jacking off. I had a blanket over me. All of a sudden, she comes walking down the stairs. I quit immediately. She doesn't notice, so I think "Oh thank God". But then, she says "I told you to keep the blanket laying down on the couch so the dog doesn't tear up the couch. OH SHIT! I would have to put it down, exposing my cock...
So we argued for a few minutes and then she was pulling at the blanket! I pulled back. I finally had to give up. So what I did was I released the blanket, and as I was doing that, I spun around looking the other way, and went in the kitchen "to get some food". She was mad at me, but I never got caught. It was worth it.