Any Advice?

My stbx has had two affairs that I know of.  Over the past two years she has grown more and more distant. 

The first affair was devastating to me.  It was with someone I thought was a friend and it lasted six years.  She wouldn't tell me how long it lasted until I pieced it all together.  She wouldn't go to counseling, and proceeded to drink a bottle of wine almost every night, then go into rages.

Now that I've filed, she proceeds to tell me that the affair years ago was a "rape"  She claims to have been in the wrong place at the wrong time and that he forced himself on her.

It went on for six years.  Is it even possible that this could be the true scenario?  Our families were friends, we camped together, barbequed etc.  I've gone through years of her drinking, the affair, the new affair, and I've just had enough.

Now she is trying to get in my head by saying she'd never have filed for divorce.  I tell her "No, I did, I'm tired of the way I've been treated, and I'm finished with this relationship".

This is just bizarre to me.  I want to proceed with my divorce, but I gotta say that this is a spin I didn't see coming.  We talked before I filed and she could care less, now this.  Any advice or ideas where this comes from?