Okay.. just finished reading about the affair which I didn't know when I was originally replying above.
..and card readings.
Listen man, since you started the affair it's really something you need to take a good look in the mirror and see where you are now. I'm sure you feel guilty about it but at this point, I wouldn't even bother with my toys. A collection is meant to supplement a good life, man. What good is a collection if your life is a wreck?
Don't blame your wife for her actions. Women are complicated and by what you have mentioned here, seems to me the actions she took were natural responses to a traumatic event, even her getting a boyfriend. Wouldn't you and I find comfort in someone else if we were screwed over?
Have a sit down with her. Tell her you genuinely want to fix things (or whatever you have in mind) and show her you're serious by making sacrifices. She knows your collection means the world to you, show her it's second compared to her and the kids. How you express that is up to you.
All in all, you need a resolution, for you, your wife and the kids. Think things trough and get it a.s.a.p.