If you can't see yourself actually DOING these things, I wouldn't fret too much about the being turned on thing. Our minds like to fantasize. Doing your mom is actually not an uncommon one. Mom and son type stuff is big on porn sites.

I still like watching lesbian porn sometimes. I get real turned on by it, however, it is much better on the screen. I've slept with women a couple of times and I've never been as turned on with a chick as I am with a guy. In real life, I don't look at women and think, "MAN! I would LOVE to get her into bed" but I WILL have those thoughts about hot random guys in the street or on the movie screen.

Also, I'm pretty kinky. Gotten kinkier over the years and wanting to explore some new things that I wouldn't have 20 years ago, but some of them are FAR out there. I mean, probably not so far out there if you're into kink but far out there for me. Bondage, flogging, rough sex, humiliation, etc. yet in real life, if someone called me a slut they'd probably get a black eye. On the screen? Totally hot and something I want to try. I figure one of these days I'll get to indulge these fantasies and they won't live up to the hype I've created in my head.

Although I have the ability to actually indulge in these fantasies, I don't think you need to experience sex with your mom or kids in order to realize that it's something you won't like. You're already revolted by the intrusive thoughts and the "turn on" has been fleeting. Not to mention it's after being face deep in boobs and a CARTOON. That's hardly predatory or deviant behavior even if it does seem a little "off the beam" as my friend would say.

Don't sweat it. Stop beating yourself up over it and STOP TESTING IT OUT. That is what is stressing you above all else. I hope you find some peace soon.