Well, my initial response is you don't have to tell her anything. If she asks, than tell her. But, there would be nothing wrong or bad with you offering that information if it makes you feel better.
And IMP is right (as he so often is!).
Hang in there!
Me-BS 38 X-WS 36 Separated 11/15/2006 Filed for D 8/1/2007 Divorce Final 12/21/2007 S13, S13 (twins), D9 Married 13 Yrs Together 20 Yrs