It sounds like you are pretty intent on doing this.
I'm not going to try and convince you not to - as you said, every situation is different and none of us know your wife as well as you do.
The outcome may not be what you like. Be prepared for that - once you lay that ultimatum out there you are not going to be able to walk it back without losing more respect from your W.
M: 32 W: 29 T: 9 Years M: 4 Years I hit rock bottom: 2/11 PA admitted: 4/11 WAW: 5/11 D filed: 6/11 now: Patience, wisdom, and growth - hopefully.