I stumbled back after a night of drinking a little later than I should have. Usually I have to go say good night to my mom, but didn't want her to smell the alcohol on my breath so went straight to my room. I must have been to drunk to remember to close the door though. I started my usual nightly routine of jacking off when Mom walked in. I was so embarrassed I tried to cover up but she came right to the bed, and casually just put her hand on my cock. I didn't know what to do. Then she leaned down, kissed it and asked if my sister or girlfriend ever did that. Well of course my girlfriend did that, she did that and a lot more, but how did she know about my sister too?
"Um...ya, they both have, how did you know?" I stammered, unsure what her response would be.