It's not a really bad call to have an affair with another school parent, a colleague (especially your boss or subordinate) , a family friend or a relative. The impact is far reaching.
I meant to say it's a really bad call to have an affair......
To clarify when I said the mother being responsible, I meant the OW/mother of the DD whose birthday it was.
I think the OW should take 100% of the responsibility for people boycotting her DDs party. If she didn't have an affair the boycotting would not have happened.
Which is why a responsible parent thinks through their actions and assesses how other people will be affected. The problem is people in affairs just get so caught up in their secret rendezvous and illicit sex that they selfishly forget anyone else.
I'm sure the other parents knew that the OP and OW were once friends and if she ( the OW) can betray her pregnant friend like this, it's no suprise they want to stay well away from her in every sense.
If I was stupid enough to do anything like this and it affected my DCs I would only have to look in the mirror to find who is entirely to blame for that.
OP, I think you were exceedingly gracious to do a swap with your STBXH letting your DS attend the party to play with her DD. What a shame she (and your STBXH) didn't give a f**K about your DCs when she was having it away with him.
Selfish people cause untold devastation to others, then have some expectation that people will care about them or their families.
The same way OWs don't think they owe the BW anything because ... you know as they so often say they didn't exchange vows with her - well that's the same way nobody else has an obligation to care about the OWs kids and whether they get hurt in all this.
I have no legal obligation to care or look out for anyone else's DCs except my own. I may have a moral obligation to do so, but that's the same moral obligation the OW should have not to have an affair with a MM.
Has she thought about her part in the breakup of your family and how your DCs have been affected. Now her DD sees your STBXH more than his own kids do.
The OW in our school went to see the HT and said her DCs were being bullied by exclusion, as they weren't being invited to parties.
The HT said it had nothing to do with school and she had no remit where it came to parties outside school hours.