You father just died. Worrying about other people’s cats is likely not a priority. I’d have some choice of words if people wanted me to talk about somebody’s cats few days after losing a loved one (I don’t wish harm on anyones pets of course). Is your mother ok being alone these days? Does she not need help with funeral? Call your sister. How about your nephews? Your husband is an adult. He could worry about cats on his own.

Was he really upset about something else? Losing his father too? But he just made it about cats?

Grief is a lonely feeling. No one can truly share it no matter how much people support each other.