OK, just keep by your dad's side the whole time your H is there, I suspect your H won't go near you if your father is with you... tell your F its buddy system for you until H leaves... do NOT find yourself ALONE at ANY TIME... if your F can't do it find someone else who has the balls to tell your H where to go if he comes anywhere near you.
And yes, you CAN just not invite him, you are choosing to include him... its ok, tha'ts your call... but it is a choice you are making.. and it IS sending your H mixed signals ... if you think he's good enough to be around your son, he's going to assume he's good enough for you too.
