I agree that why cant they just have them on backburner working through the infiedity and being there for their parents. Especially since we don't know how far John will be towards his recovery by the time they leave or if Brady will be found by then and now there are spoilers that Bo has a serious illness. (I would a little better about that if it wasn't for the news about BB and MM). But even worst case for Bo Shawn-d abandoning his sisters and Mother after that doesn't make sense. I am thinking that they will decide to get to away from Philip and move somewhere but at least "dying" wouldn't be abandoning their families like it seems they may do. Which isn't the Shawn-d and Belle I know.