You are not divorced so I think you are the closest relative he has, so yeah, you probably are responsible for him. You are not responsible for the daughter since you did not adopt her. Her mom should step in if mom is able. If not, it sounds like grandpa should step in. If dad dies, you may want to consider being her guardian if there is nobody else.
Answered on Feb 21st, 2014 at 6:18 PM