So if JH and WH were separated, and based on things we know about the past, I wouldn't think WH would leave cooperatively/amicably. If AJ were driving the red truck at college and maybe WH was on the title, maybe he was difficult about it and took the truck back...maybe he needed it to move stuff out of the house. Also, he'd need to be paying some sort of support and maybe he was being difficult about that. Maybe the $300 he gave to AJ was to go to JH but he was pissy about it. If they are separated they don't seem to want that known so maybe that's why he skirted around the topic of what the $200 was for. If AJ was playing intermediary between JH and WH, maybe she was pretty busy and stressed dealing with all that and that's why no SM. But, the SM should have picked back up at some point.
Just speculating...MOO and all that.