Incest/Freudian issues aside, is your mother sexually attractive?
I found a few pictures of my mom, but they were rather tame. Lingerie pics taken with a Polaroid. I hate the frizzy hair style that was popular at the time. I wish I copied it still though. I still know where it is, but having moved out and being married myself I don't exactly have many opportunities to rummage through my parents stuff anymore.
To expand on that... She is apple shaped, with a large belly. Completely flat ass. She's also going bald - runs in her family. She has the legs of a 30 year old though and very soft skin... Meh... I'd still fuck her for the hell of it.
My parents divorced when I was 11 - 27 years ago. They had a polaroid camera back then. There has to be photos of my Mum, I know it. My Dad lives alone and there is no way I'm finding those until after he's dead. I doubt he'll have got rid of them.