Sorry, this is a long post, but I want to explain the situation as honestly as I can.
On Sunday, we celebrated DS2's first birthday at our house with DH's family: his mum and step-dad, sister, and his dad and step-mum. (His parents got divorced when he was 6.) My family live in France.
It took me a great deal of efforts to organise this. I have found it difficult getting on with my in-laws since DH and I got engaged. (DH's dad originally said he wasn't going to come to the wedding, but he changed his mind.)
But now that we have children, my in-laws have gone in complete overdrive, especially since we are planning a move to France.
Up until now, I was getting on OK with DH's dad (I even organised a steam engine train ride with him), but not anymore.
I booked a holiday in France, which means we can't attend my sister-in-law's birthday on the day. She is not fussed about it, but my FIL emailed me to make a big issue out of it because she's had breast cancer and he thinks it's important DH and the kids are there to celebrate her birthday.
He asked me to cancel the holiday, adding: 'If your presence is required in France, then we will come and look after the children for as long as required'.
I read this as 'we don't give a toss if you are there or not, you have produced some grandchildren, your job is done, just get out of the way'.
BTW, I am still breastfeeding.
I replied I would not cancel the holiday.
Then my FIL emailed DH, a "clear the air" message, as he puts it. I call it adding insult to injury.
The context is that I am not returning to work after my maternity leave. I took voluntary severance because basically the childcare costs would be more than what I earned.
FIL writes to DH: 'We admire the way in which you have, and are, keeping your family together and providing for them. It is because of that that we are concerned - you are doing too much, and that level is just is not sustainable (...). If you are unable to have this input, then what? That is why we are concerned about the imminent move to France - this is going to be the most stressful undertaking you have ever embarked upon, and it would be immensely difficult (...) even if both you and [me, the OP] were running all cylinders, which it appears to us is not the case.'
So there, I am not running on all cylinders. That's what they call stay-at-home mums these days? 