And Ret will not convince your wife of anything.... They TEACH couples how to get along better... Your wife is given skills and WORK to do... If she does NOT do the follow up at home afterwards (and she may not) then Ret isn't very successful...
I am not dissing Ret, but I do think you may need to db for a bit longer before you get her considering Ret. If you push it for long right now you may just turn her off of it for later when it may be effective.