My father smokes about a pack a day. I know that your loving instinct can lead to you asking him to quit repeatedly, but you have to also respect his boundaries and be tactical about it if you do ask. If he's done this to you in the past, then you should keep expecting it, unless you try something new in a different situation i.e. not in a closed room, in a coffee shop or restaurant or something. He has to want to quit, so until he wants to quit you should be supportive, let him know that you're there in the event that he does want to quit, tell him the benefits of quitting, and leave it to him.

How do you know she's an adult? She could very well be a child or teenager living with her parents, in which case her right to breathe in her own home trumps her father's right to smoke in his own home.

My mother has been smoking since I was a young child. It's been 17 years that I've known her and have seen her smoke. She quit for a year, but then my stepdad who also smokes got her back into it. I've tried many times to get her to quit. It came to the point once when I was little that I got so angry at her for smoking, that I took all her cigarettes and cut them up. (Not smart obviously, they're very expensive) but at the time I didn't give a shit if they were expensive, it was my mothers health that I cared about. And recently finding out that I have asthma because of her smoking all these years, it makes me even more upset that she smokes. She's trying to stop though, just like your dad should. She also smokes outside, and you should try and talk to your dad about that. My point about this, is that I know how it feels to have parents that smoke. It's hell, especially with asthma. But whether you talk to them or not, it's still very hard for them to quit, especially if they've been smoking for a long time. You and your father need to sit down and talk, quickly that is so he doesn't light another one, and sort out where he should smoke because of your health. Good luck OP.

I can tell your dad really cares :P

When my mom started smoking again, I would spray her all over with febreze whenever I saw her and tell her to go shower and brush her teeth. I'd also print pictures of people with mouth and lung cancer and leave them around the house. It didn't work too well - she still smokes - but now she knows not to do it in the house since I told her I won't tolerate my house smelling like an ashtray ;)

honestly, i'd steal every last one of the cigarettes and lock him inside the house and force him to quit.

OP: once he lit up, why did you stay, if you knew it would trigger your asthma? Yes, your dad's an ass, but protect yourself.

I can't believe people are defending this guy. Addiction to smoking is 100% the addict's fault and while getting them to quit is harder than just asking them once, OP shouldn't be blamed for trying. OP's dad SHOULD quit, it would benefit literally everyone. No one should just "respect" that he wants to smoke. I mean, we don't "respect" people who like to steal or murder other people, do we? Extreme exaggeration, I know, but you see my point: it shouldn't have to be like that. As for the specific case at hand, I think most people are missing the point. The FML isn't exactly that OP's dad is a smoker and OP has asthma making it all worse, it's referring to how WHILE SHE WAS TALKING, her dad lit a cigarette in his daughter's face. Not only is this rude because he was interrupting her, it's also rude because he was pretty much spitting in the face of what she was telling him, i.e., to quit smoking (that or he wasn't listening at all), and also it's just plain wicked that he knew she had asthma and lit the cigarette right in front of her. I mean, it's bad enough if you do that to anyone, but someone with asthma? That's low. TL;DR: FYL, OP. FYL to infinity and back.

At the very least make him smoke outside. My dad smokes, but he has NEVER smoked inside the house.

what a dick