No, thank god though that I havent walked in on them. I always knock on their door before i enter the room and ask permission to enter in order to prevent me from seeing anything, but they are rarely in their bedroom together other than sleep. To be honest though I have seen my mom naked which was kind of weird. A couple of years ago after her showers sometimes she would run from the bathroom to her bedroom completely naked and other time she would be in the bathroom after the shower naked, getting ready, but she would leave the door open. but she doesn't do this anymore.

I had to look up Oedipus and im guessing that it involves some sexual relation with your mother? Truthfully, I can say I haven't had this kind of dream before. It's interesting though....