In Laws booking a holiday on due date

So my in laws have booked to go on holiday like 5 days before my due date and get back 5 days after. They literally could have booked the holiday any time (no work commitments etc meaning that was the only time they could book) and they’ve chosen to book it before during and after my due date.

It’s their first grandchild and we have had 2 miscarriages before this baby stuck which they knew about, I’m 26 weeks now so this is the furtherest by a long way any of our pregnancies have got and they knew I when I was due which is why they didn’t invite is so it’s not like they forgot. It’s a big family holiday and most my husbands side of the family will be going, his sisters, aunties and uncles as well.

Just wanted your opinions on this as I’m not sure if my reaction is amplified by hormones but I’m pretty hurt by it. I don’t understand why they didn’t go a few weeks before my due date or wait till 2/3 weeks after when the baby will definitely have been born.