Yeah, I don't bother making up stories for missed meetings anymore. I since then noticed that they stoped asking.
"We haven't seen you in a while, how have you been doing?"
"I've been great! Thanks for asking!"
"You haven't been here often though"
"Well, my objective is to be here at least twice a month, If I can reach that goal, then, I'll be happy"
As long as you look very happy, they don't bother you.