It's going to be uncomfortable no matter what for her. She has to unfortunately face the consequences of her past actions like we all do. For some of us, our actions left to our WAS. For others, it lead to piecing and having the face the inlaws after having an A.
Let her know that you know it will be difficult and can understand how she is offended. But, you'll do your best to support her in reconnecting with your friends. You will let them know how happy you are to be with her and you are trying to forgive her. If you can forgive her, they sure as hell ought to be able to.
We all know why she's offended, no need hashing that out.
Let her know that you'll be there.
I anticipate if I ever move into piecing I'll have to have this same conversation with my family, which knows about my W's EA and such. That will be difficult.
Just continue to let her know that you're working from a place of love and will let everyone else know that. Maybe she'll understand some day that the truth of what happened hurt your friends and family. She'll have to make amends with that and you'll support her.
----"Et tu, Brute?"---- me:28 W:24 S4 T:6 M:4 EA Exposed: 5/21/10 Bomb: 6/20/10 (Father's Day) NC w/ OM: 7/10/10 W moved out 8/21/10 http://bit.ly/aOrZne - My sitch