Such a challenging situation for everyone involved.

People always say, «there’s no wrong way to grieve,» but as a society, we don’t really believe that. If a mother brings up her son who passed away days after he was born at every occasion for 20 years after his passing, people would not think she has grieved in the «correct» way, and maybe they’re right. It’s probably not «correct» to never get over the loss of a family member, but it happens all the time, and sometimes there’s nothing one can do about the grief they have that does not subside, no matter how much time has passed or how much therapy they have attended. 

The same can be true in the opposite direction. Sometimes, people don’t grieve for as long as society would deem acceptable. If someone is publicly partying mere days after losing a friend or a close family member, that might be their way of coping with a loss so significant. It might look flippant and uncaring, but everything is not always as it seems. It’s not the 1800s anymore. We don’t have «mourning periods» where we must wear black for a year and never leave the house.