Yes be proactive. You will feel better. I would call her and be very clear about boundaries for everyone’s safety. Who knows what she sees her friends’ families doing on social media? Yes follow up on the phone call by sending pictures. Do your kids like to draw? It sort of sounds like she needs to know she is cared about and it sounds like the knowledge her loved ones are safe will help her feel better too. You can do it all. Or really, really, your partner can. No, don’t sit back and do nothing. My own mother is very narcissistic but it’s easier for me brush her negative comments off my shoulders and just be courteous with her rather than face her wrath. Your mother in law just sounds like she is well intentioned if slightly confused. Good question.