First things first I have changed usernames for this but longtime MN user.
MIL has unfortunately been suffering from some MH issues now for the past couple of months, started off as work related stress and anxiety but has developed quite seriously to the point that around 3 weeks ago she needed a 2 night stay in a specialist hospital. DP is an only child and his mum does not have a partner but has support from her sisters who live round the corner whereas we live around 40 mins away so when all this started, she asked her sister not to tell us what was happening as she didn't want to worry my DP.
The updates we would get at first were "she's doing ok" and when DP arranged to go and visit she would end up cancelling last minute. He would then ask his aunt if she thought he should just go anyway to be told, "if she said she doesn't want you to go, don't go and potentially stress her out more by ignoring her wishes". The day she ended up in hospital we didn't find out until she was already there when his aunt reluctantly told him. Since coming out of hospital DP has kept more in touch with her and she seemed to be making positive progress.
Last weekend we were visiting friends over near to where his mum lives so we had arranged to visit her with the DC first. This was cancelled by MIL on the morning of our visit but as we were already over that way on the afternoon, I encouraged DP to pop over anyway whilst I stayed with our friends and the DC.
On the way home that evening DP told me that for the foreseeable future he would be travelling over on a Friday afternoon to stay with her and returning on a Sunday evening. It wasn't a discussion I was just told what would be happening with no say. She's lonely apparently but does not want me nor the DC there with him. Now that Friday is approaching I am feeling a mix of upset and anxiety that he's doing this.
We both work fulltime in quite stressful jobs, our DC are in fulltime childcare Mon-Fri, I really look forwards to our weekends as we tend to spend a day together doing things as a family and another catching up on housework and life admin. This weekend I am left alone with our toddler DS and my older DD. To slightly add to the stress it's DD's birthday next week and I was planning on spending some time this weekend prepping for that.
I really want to be supportive and obviously make sure his mum is OK, but does he really need to go all weekend?! I feel like he's putting MIL ahead of me and our DC. The thought that this may not be the only time going forward also really hurts. I also suffer with anxiety that is exacerbated when I feel overwhelmed which this weekend is potentially going to do.
YABU - It's his mum, he needs to do what he needs to do regardless of the impact
YANBU - A one day visit would suffice and he needs to remember to take his immediate family's feelings into account too
Fully prepared to be told IABU, but also any advice of how to handle this would be much appreciated.