Visiting Smoking Relatives.

[mom-in-alberta]

I am sorry that you were put into this position. I am also a "reformed" smoker. There is nothing more disgusting to me than when someone comes in from a puff and you get that stanky old wave of stale cigarette odor. **UGH**
I would just say, to your dad (because it's actually none of your siblings business), "I love you, and want to be around you, but being at your home makes me physically suffer." Can he come cook at your house? Maybe you can host, and dad can do all the cooking?
Even if you went, and nobody smoked the whole time you were there, you would probably still get a migraine, no? At this point, it is imbedded into the drywall and furnishings, if he has been smoking for a while.