Chatting to my (pretty much best) friend yesterday and she drops into conversation that her DH had received an email from his ex girlfriend.
For context, friend has been married to her DH for nearly 10 years. He was in a long term relationship with this ex for several years, I think they may even have owned a house together. But that relationship broke up about five years before my friend met her DH. So this ex girlfriend is from at least 15 years ago.
Anyway, there has been no contact between my friends DH and his ex in all that time. Save for this random email which was basically an introduction, a catch up about her life and attached were several photos of the ex girlfriends family (she's married with a child) her dog and even her back lawn.
The email was signed off with a phone number, and an invitation to meet up for a drink sometime and have a catch up. The ex apparently lives no far from my friend, same borough.
My friend didn't seem fazed and just basically mentioned it in passing as if her DH meeting his ex who he hasn't heard from in 15 years, was a perfectly normal thing to do 
I pretty much told her to get a fucking grip, stop being so naieve and put a stop to this. Now.
Surely I'm not the only one who thinks this is madness. Nobody just sends a random email asking to meet their ex after 15 years. No unless they have something to gain. I said this ex sounds like shes having a mid life crisis and wants to recapture her youth. I'd be livid if some random ex started to try meeting up with my DH.
AIBU?
I left lunch feeling at a loss. Like I can see something really bad about to happen but cant stop it.