[Rose of Cairo]

This is an ethical question I'm thinking about at the moment. Let's say someone you care about has a habit that you personally find unhealthy or harmful in some way. For instance, I personally find smoking or eating cooked foods unhealthy and harmful. Now, you know this person would be glad if you did some action X, but doing X supports their habit (like cooking something for them, or going to buy cigarettes for them because they are tired). Let's also assume the action itself is not ethically a problem for you (cooking vegan dishes is not an ethical problem in itself for me, or let's assume you would go buy cigarettes with their own money, so it's not your money that you give the tobacco industry).

Now my question is: would you do it?

I'm having a hard time deciding.

Possibility one: I say "this habit is unhealthy and harms them. They are free to do it, I respect their choice but I don't want to help them harming themselves because I love them. I don't want to have anything to do with it, so I won't support it in any way" => I don't do X, and show my love for them in some other way.

Possibility two: I say "They have free will and it's their choice to do it, this is none of my business. Their health is none of my business either, even if in my opinion they're harming themselves. I respect their choice, and since they chose to do it anyway and since they would be happy if I did X, I'll do it because I love them and I'm happy when they're happy." => I do X as a gift for them.

What do you think?

I guess it's a matter of values? But I'm having a hard time defining which values are relevant in these two cases.