Hopefully she can see that I'm not some crazy person.

I'm sure that she can!

Have you told your MIL anything regarding your W's affair? It might be a good idea to send her YOUR side of the story before you W arrives for the wedding...

I'm sure that you W will have all sorts of new stories about how you've been stalking her and so forth... If your MIL doesn't know the full truth, then think it would be good for her to hear it from you.

If you do e-mail your MIL, I would stick with your goal of "doing whatever it takes to save the marriage"... and then ask for you MIL's help...

Semper Fi,