Does anyone think I should offer to postpone the joint session again? To be honest I am not sure how useful it is to get him on these sessions. Him saying how busy he is with school gives me a perfect excuse. I could just say, "You've mentioned how busy you are with school. Do you want to postpone this week's session? I'll go with your decision on this".
ITH,
I haven't had a chance to catch up but I would say no, just leave things. He already agreed that he would do it just go with the flow. It feels like you are wanting to control things again, take a step back.