Husband called his mother-in-law every day to report safety is a kind of what kind of psychology?

Nothing abnormal ah, with their own family contact every day, what, that the family relationship is very good and close, independence and growth is not not with the family contacts, everyone's family environment is different, tolerance point. I now also will call my mom every day to report safety, so that he can rest assured. Especially when I go out of town more will give him a call.