My DS who is 16 moved to his dads a year ago. Long story short he doesn't get along with my partner and thought living with his dad would be easier! His dad has two young kids 6 and 3 and his partner suffers with mental health. My problem is that he's just started A levels at sixth form and along with finding this and the new COVID rules overwhelming, he's still having to babysit his younger siblings for 3-4 hours whilst their parents 'sleep'. He's also moaning that he's having to do a lot of chores and is finding it stressful fitting everything in. I know I should speak to his dad about it, but I will only be accused of interfering in their life! I've told him he can come back home, but he says that he feels responsibility for the the kids. In his words, they're feral mum, the dogs might as well be bringing them up. Now I know he's probably over exaggerating but I am worried 
. Any advice please