Firstly, congrats on trying to give up the s after 20 years of smoking ... I'm not far behind you - my quit date is about 2 weeks away

On one hand, I want to say yes, how rude and inconsiderate.

On the other hand, is he a smoker? And the other thing is, you have stated that you have had many many conversation and arguments this year, so this wasn't a one off argument picked on the day.

Stress levels are overly high when we try quit, as is anxiety (I've quit in the past) and anything can act as a trigger.

I think you need to discuss a "cooling off" period for the next 3 days, which are the toughest, about not discussing marital issues.