I don't want to drip feed but there's a long and involved backstory which I won't go into.
Basically PIL have stopped speaking to us because they realised we were in (very limited) contact with DPs brother. DPs brother is NC with PIL and PIL want the rest of the family to freeze our BIL to try to get him to speak to them. 15 years on and it's not worked. We always said we wouldn't totally stop speaking to him and it's always been a point of tension.
They've fallen out with us about this and stopped speaking to us for a year or so a couple of times. That was before kids. When we had kids we said this had to stop. You can't expect kids to understand the blowing hot and cold. And it's not behaviour I want to normalise for them.
Anyway, PIL have gone from staying with us for months on end, being very involved with DCs to not speaking to us for 6 months (so far).
They have gone travelling and so are distracting themselves day to day. The DCs are confused but very young so pretty resilient. One has a birthday coming up.
It looks as though PIL will ignore the birthday. We have written to them to say this isn't acceptable and if they don't contact the DC soon we're done with them. Be grumpy with us but don't ignore the kids.
I'm fine never speaking to them again. I don't like them and think they are unpleasant people we're better off without.
My worry is that when they return to the UK and have got over their strop they will want to pick up as though nothing happened. That's how they were before.
Would I be reasonable to hold firm and say they are out of our lives for good?