That's really nice, but it is unusual. You are lucky
My personal opinion is that Tanya was blindsided by Jim actually leaving her, and is grieving her failed marriage and loosing what she thought of as her life partner (hate that phrase but... can't think of another) the hair change and weight loss are huge indicators of this. She might have thought would ride the rough patch out, then Jim started fishing, found Sarah and made the jump. I don't believe he would have left Tanya until he had a replacement lined up.
To save face Tanya has to pretend she's fine - she ain't. To move on with her life, i think she should minimise contact, if he wasn't suh a knob, jim would do that himself.
![Smiling face :relaxed: ☺](https://cdn.jsdelivr.net/gh/joypixels/emoji-assets@5.0/png/64/263a.png)
To save face Tanya has to pretend she's fine - she ain't. To move on with her life, i think she should minimise contact, if he wasn't suh a knob, jim would do that himself.