Well, that says rather more about her (OW) than about you or the sitch! Suggest you ignore it, take the glorious high road and block social media access as much as you can.
Gosh, just think there was a 'lipstick on the collar/receipts in jackets' time instead of FB and texts on mobile phones....
Me: 53 H:38 T:20 M:14 BD ILYB etc 10/15, H diagnosed severe depression S 1/16 PA 4/16 H filed 1/17
