Ink,
Where the elder said: Well from now on, if you are not there Thursday nights, We will be calling you.
You know, to find out whats wrong. And so you can tell us how to help you."
Tell him "it's your dime"(referring back in the day of a $.10 payphone). and leave it at that, and don't answer his calls or answer the calls it don't matter, but I would make him work by not being that availible, eventually he will give up calling you anyway it is just a tempararry zeal for calling you up on your absenteeism that will fade very rapidly.