I got caught one time that I know about. When I was married my mother-in-law was spending a few weeks (truned out to be a few months) with us and was sleeping in the guest room. At the time, the VCR was in the living room and for me to watch any porno, I had to do it very late at night. One night after everyone went to bed, I popped in a tape and was watching it. Of course I started to masterbate and was ready to orgasm. Out of the corner of my eye I saw a figure standing in the hallway. I didn't stop...I kept going and shot a few seconds later. When I looked back, the figure was gone. The next morning, my mother-in-law could not look me in the eye. She got her own place a few days later.