When I read your choices, keeping the children appealed the most but divorcing Bonnie. He sounds like he needs support rather than doesn't want his kids. The social worker in this game fills me with dread but you as benevolent social worker is also good option. As was asked before do any of his siblings look capable and then he could maintain contact with the kids? Loner sims dont have many friends / connections but is there any suitable more family oriented females he knows who could be potential stepmothers? Good story potential there too.
