Just have to quickly add my WW to the bunch. When we started dating I was actually her EA (2-3 months) before she actually broke off with her current boyfriend. It was very innocent but if you just look at the pattern it is the exact same thing that happen to me only she isnt 18 anymore, has kids and was married. I never ever thought of it that way until a few months ago.
Me: 34 Stbxw: 30 D:5 D:3 Mini bd: May/June 2019 Married: Aug 2019 BD: 6th Dec 2019 OM Confirmed: Feb 2020 March 2020: I filed for D Waiting for D to be finalized and W to move out end of January 2021