Leave? I personally know of two cases where that worked for a week in one case, and a month in the other. And after that time, the family dynamics and love life were right back to the old no-sex routine. I would say the mistake was they didn't combine it with therapy. Which we've been to.
My inclination would be to open up the marriage, beginning with a discussion of the intent to do so, or being very open about the process of doing so if she doesn't want to discuss it. No secrets. That seems like a much more direct and honest approach to me.
