What I see from my wife is someone who has really been working on her weight/appearance, reading an absolute ton (more books in a month than most do in years/lifetime), and as I mentioned in a post above has been being affectionate "with herself" quite a lot which hasn't always been the case.
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My EW did the same in the six months prior to BD, excessive working out, cosmetic procedures, weight loss, and eventually purchased a "personal massager" or two. Although she didn't start the PA's until after she filed for the D a year after she left, I eventually discovered that she was having a fantasy affair with a 17 year old student she met while chaperoning a high school trip to Europe. MLCers are messed up. They will get their fix one way or another.
Taz
M59 (53@BD) XW56 (50@BD) S26 (20@BD) S24 (19@BD) Married 25 (22@BD) Together 28 BD 9/29/19 (moved out unannounced while I was on fishing trip) W filed 10/19/20 (Informed me via text) D final 11/10/22