Just because the jealousy bug crept in does NOT mean she really wants to make things work.
This was the case in my situation last Dec when I was briefly involved with a OW for the first time in years. She snapped and she even still gets her dander raised when she suspects OW influence on me.
I think it's a power play with them or something. I think they want to believe they are irreplaceable or something, not necessarily wanting you back. It's very much a matter of pride to them. They have big ego's in this regard. She would be completely thrilled if you became a celibate Catholic priest.
I know my stbx is going to freak when she gets a load of the OW I'm taking to my brother's wedding. Many mutual friends of ours will be there. We're not real serious with each other at this point, but we've been out together here and there for the last year. We're just very good friends at this point. Just so happens she's 20 years younger than me, very refined and mature for her age, and stunningly hot!
Be careful reading to much into your W's reaction, it's still all about her. It's most likely not going to change your situation one way or the other, so just have fun with the here and now. If the waw wants to reconcile, it won't be jealousy that accomplishes it.
"It is curious that physical courage should be so common in the world and moral courage so rare." -Mark Twain