WW, wlc, Waw or What?

[Btrow]

When I first posted here 9 months ago, I had massive doubts whether my XW was a WAW or a WW (I never found any hard evidence back then of OM before BD). I came to the conclusion though, that OM was on the scene appx 6 months prior to BD. A recent event has made me question myself again.

Last week the Kindergarden had the annual christmas party for the kids, parents, siblings and grand parents (basically santa comes and hands out treats for the kids, they dance around the three and sing a couple of carols). XW was there with our kids, XMIL and her cohabitating partner was there and XW had also invited my mum and her cohabitating partner to join, which they did. (I wasn't there, but mum asked me upfront if I was ok with them going, which I off course was).

When it finished XMIL and cp drove home and as my mum was about to start her car, XW came over, knocked on the window and invited mum home for a cup of coffee. My mum was caught off guard and accepted the invitation. They had coffee at XW's and she even invited them to stay for dinner... (which they declined).

Is that normal behavior for a WW?

One of my friends told me that it must have taken quite a lot of courage (guts) to invite the mum of the guy you betrayed and left for OM. The had a good relationship when we were married but haven't seen each other since october 2016. I find it odd ..

So could the vets please chime in? Normal WW behaviour??