SO tobacco use

Cassie
So my fiancé has always said "when you quit smoking, I'll quit dipping" (he does the dip pouches)
Well when we found out I'm pregnant I slowly cut back and since we've moved in with my mil I've quit completely but he still dips. 
It's getting kind of annoying. Whenever he says he's got a dip in or he's "needing" a dip it makes me want a cigarette (he's a corrections officer at the prison so I understand his job is stressful but they aren't supposed to use tobacco on the job anyway) but I'm hell bent on not smoking for the sake of baby. 
I haven't seen any studies about dip around infants but it would definitely save money if he quit. 
I just need some advice about going about talking about it.