Dad seems to be grasping at straws... and not just any straws, the curly ones that go here, there, and everywhere till you don't know what's up and what's down. It truly seems like you are trying to do what's best for both kiddos. If you are providing Dad with a calendar and he knows what time the kiddos go to bed, then he should know better than to call at times when you are not home or putting kiddos to bed. If SM is the one calling, then that's her problem and you don't need to worry about it. She's nothing in this equation, so she doesn't matter.
Personally, I say give Dad the rope and let him hang himself. You are trying. You are learning. Let him look like the jack... donkey
Personally, I say give Dad the rope and let him hang himself. You are trying. You are learning. Let him look like the jack... donkey