And it's quite possible that when Michelle's son did not hear from his mother after getting off the bus or getting home, he called YS. YS likely knew that Michelle was running a little late and may have told him that she was dropping off the twins at their father's and that she'd probably be home very soon. So being 11, he probably just left it at that. Maybe got involved with something and lost track of time until 6:50pm when he started calling, probably the salon, again.
MOO
Shouldn't this have set off an alarm in YS that Michelle was not home and if not why?