2OC it ain't over until it's over... and even then sometimes it isn't.
Your wife sounds like she is deep into the fog of an affair. When this is the case you have three choices:
a) find out and do your best to expose the affair b) batten down the hatches and hope that you'll still retain some semblance of sanity until the affair is over c) let go
As counter-intuitive as this may sound, you've reached a good point. You're prepared to let go.
Your next step is to look out for yourself and your child/ren. Prepare yourself mentally for the worst kind of divorce you ever thought possible. It might not go down like that, but prepare for it. Find yourself the means father's rights attorney you can if you want custody. Since she's hell-bent on divorce, its your job to show her the bleak reality of divorce - especially the warts. This MAY shake her up a bit.
By the way, the sale of the rings... don't forget that you're entitled to 50% of the proceeds. She's converted your gift into cash... and well... half of that is yours. Ooops!
The way I see it, you only have the option of LRT left and tough love.
Good luck and I hope you continue posting here.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT