Mom Caught Me Stroking It

I missed being at college. It was about to be my Mom's 40th birthday though, and she wanted the whole family back home to help her celebrate. I was happy to be there and it'd be nice to see everyone, but my girlfriend couldn't come back with me and I was suffering without her. Desperately horny and constantly hard, I had to resort to taking care of myself, which was fine until Mom caught me.