Bereavement can have a wild effect on those who experience it, and quite often, everybody goes through it differently. It is a situation that is an inevitable part of life, but that doesn’t make it any less tough. The side effects that come from this can sometimes seem nonsensical to other people, to say the least.
For those who are supporting somebody going through something as difficult as mourning, it can be a delicate balance (especially if you are a close family member). On the one hand, you want to respect how they process their emotions, but on the other, certain boundaries can be necessary if they show extreme behaviors or make rash decisions. It is not a pleasant thing to be on the receiving end of, in particular if it is a scenario that you do not have a lot of agency in and where it may change circumstances drastically.