Wow, I am not sure how I would react. After what she knew she chose to friend him and act like things were normal!?! Part of me would want to confront her, but what purpose would it serve. I would probably do the same thing you will do, not say anything and limit any further contact with her. Did she know X before you two were together? Would she somehow feel more loyally to him? Is she still friends with his 1st X?
"You can't stop the waves, but you can learn to surf." Jon Kabat-Zinn
