My ds 16 has recently got in with a dodgy group of boys. Amongst other things he's started smoking (poss dope). His dad (my ex) is ok with this ad smokes himself. Our house is non smoking, and I'm having a hard time dealing with my ds smoking, the smell etc what it's doing to his health, as a child he had asthma/eczema and recently every time he gets a cold his chest is bad. My ex and his mother are buying ds ciggies and tobacco, my ex even told him it was "healthier" to smoke roll ups! Ds has said he wants to stop but feels he can't , so I've booked him into a cessation course. I'm furious that ex is undermining ds health is this unreasonable?