Quote
She wears it occasionally, I think to (1) try to reel me in when she’s feeling insecure or (2) around friends who don’t know about affair (and wanting to spare judgment) or (3) when she wants to try to manipulate/control me because she knows it meant a lot to me.

As someone external to your situation, she doesn’t sound like a very nice person.

Appears to be very manipulative, controlling, and has a high level of disrespect for you given she thinks you won’t join the dots about her wanting to manipulate you by wearing it.

I’m not sure I’d give any of my brain space to thinking about whether she wears it or not.

Best off using that time to go for another run, do some clothes shopping, finding a new aftershave or dusting off your bike and going for a ride.

You should reserve your thoughts and feelings and emotions for someone who is worthy of it.