your mom left for another man just a few months ago, your dad still hasn’t fully recovered from that so he started to drink and smoke more often than usual but he isn’t abusive or anything, he loves you but he just can’t deal with anyone. He has big feelings and needs to cope somehow

he just got home from work, as expected he was smoking. Thankfully he wasn’t drinking but he stinks like cigarettes

“I’m home!” he yells and goes lay down on the couch