Don't do it, sparkwins. I have been exactly where you are & it won't happen. There is never a good time for you both to quit, you just feed each other's junkie with excuses until, eventually, you just don't even talk about it anymore.
I don't know what the answer is, but I do know it isn't start again. That is NEVER the answer. You have a great quit going, it's yours & you might have some unique challenges in protecting it. Giving it up is not the way to do that.
I agree about asking your wife not to smoke in the bedroom or bathroom (how does the sight & smell of ashtrays not sicken you? Really, bend right over one first thing in the morning & take a big whiff. Gross) , but she might be feeling defensive & territorial. If so, you might have to sleep in another room & use the other bathroom until, either you feel confident enough to deal with it, or she concedes territory.
The smoking spouse can feel really left behind in a situation like this, & that gets compunded by guilt because she knows she should support your quit and a vicious circle develops.
You can do it, sparkwins, many quitters here have quit with smokers in the house. Don't throw away those 18 hard fought days. In fact, go get yourself a reward & ask your wife to join you!
[B]My Milage:[/B]
[B]My Quit Date: [/B]5/13/2007
[B]Smoke-Free Days:[/B] 172
[B]Cigarettes Not Smoked:[/B] 3,440
[B]Amount Saved:[/B] $1,892.00
[B]Life Gained:[/B]
[B]Days:[/B] 17 [B]Hrs:[/B] 5 [B]Mins:[/B] 5 [B]Seconds:[/B] 13