Cheaters Anonymous Community Group
This is a support group for cheating spouses looking for understanding and strength. Betrayed spouses are welcome to post ONLY if they can do so in a supportive manner (no bashing...these posts will be deleted), and please do not comment on 'Cheaters Only' posts.
Your GF sounds like an open-minded woman, and I believe in as much transparency as possible. If I were you, I would tell her, in a light, nonchalant way, that the OW contacted you and you sent the message that you are no longer interested (as so to remove any doubt in your GF's mind). As far as the exOW, I would either not respond or send a short response letting her know you hope she is well, but you are now in a monogamous relationship with a wonderful lady.