Feeling bad is OK. Avoiding doing the right thing is not OK.
You absolutely did the right thing by letting her know - I know it took some courage. The first time I confronted my wife's OM it took some courage but I was glad I did.
In time she will be grateful that you let her know. She is able to proceed forward based on reality and not an illusion ... and so are you.
Things in your situation will assume a different dynamic from here on.
Me: 46 W: 46 T: 23 M: 20 DS12 DD11 DS5
W left: 01/28/08 Discovered OM: 02/26/08 W back for 9 days: 04/08 W returned 05/21/08 EA/PA - 01/08-07/09 W's MLC 2008-2014 (realised this much later)