Remember not to believe everything you hear from her. The WAW will always paint a really bleak picture and really stress what ruined it for her, and maybe in a way it did, but there is more to the story.
I wonder if either A) the taste of freedom associated with her music and the prospect of being in a band was the push for this B) If there isn't an outright affair, perhaps there is an interest, perhaps from someone appreciating her musical aspirations. Any chance of an affair, at least an emotional one?
Try to avoid any more talk about the relationship. If the opportunity arises, feel free to validate her feelings and her musical aspirations. If she's playing, just go a quick "sounds good" and move on.
