DS is in year 1 at school.
ExDP smokes in the house. He denies it, but I know he does. Weed and cigarettes.
DS regularly goes to school and/or comes home to me from his dad's smelling of cigarettes. There's been a few occasions where either DS or his things have smelled like weed.
He always says "oh sorry, his clothes must've been next to a pair of my shoes that smell of it"
"Oh sorry, my friend has been lighting incense. I'll get him to use candles instead"
He's just dropped off some uniform that he's had at his, and they stink of cigarettes! To the point where I'm sending DS in without a school jumper, I'll drop one off once it's washed.
AIBU? I'm at a total loss.