Is AUTHOR wrong in the post ? POST : For context I live with my grandparents while my sister lives with my mum. It’s a long story why so I won’t get in get into that at the moment

So my grandad used to smoke before quoting and started to vape, I was fine with this and was happy for him until my younger sister was born. At the moment my sister is three years old and come over a lot and is always near my grandad and he is constantly vaping in her face and mine.

Now would be fine with him doing it near me (not my sister tho) however, he recently started using these incense things that make the smoke smell awful and since I have quite thick hair for some reason in lingers and my hair smells awful for the rest of the day unless I take a shower which I’d rather. It do when I have to get ready for things when I have already throughly showers in the morning 

I have talked to some friends about telling him and are saying that I am being unreasonable and because I chose to be in there so I have to deal with it even though I still want to be able to talk to him without having smoke blown in my face

In short Would I be the asshole if I were to ask my grandad to stop vaping while me and my sister are in the room?