My emotional-affair WS kind of did the opposite. Two significant aspects of her EA involve the fact that both I and her AP are musicians - but he is much more accomplished and advanced than I. Another aspect involved his having a foot fetish that my wife catered to.
In the wake of DDay and after the affair was over, she is kind of awkwardly overt in her praise my musical abilities and seems to want to give me foot massages - something we rarely did before her EA, if ever. Again, she seems to be doing the opposite of what your wife is doing and I think my wife's motivation is to sanitize these triggers and stress to me that her affair involvement with her AP is over. As some people are saying above, at some level this doesn't seem to be the case with your wife. Has your wife sent a 'termination letter' to her AP and has ceased all contact with him? It would seem essential.
BH, 5+ Mo EA, DDay 3/8/18
"...regarding all as God after God."