My maxim in any group I start or join is "Family comes FIRST".
I reserve that for myself and I expect the others to follow it as well.
Indeed, I cancelled a session as one player had to observe the spouses birthday, a happy home life seems more important than an RPG to me.
Do what needs doing and get back when situation allows but not one moment sooner.
++++++++++++++++++
Skel: "Ever seen a drunk Lich before?"
Nort: "An drunken undead wizard? How's he get drunk?"
Skel: "It ain't friggin easy, le'me tellya.
Now pass me another beer or spend the rest of your life as a frog!"