my two cents, most marriages fall apart because there is no communication from the beginning, like relationships marriage has that honeymoon phase where the little things that would normally annoy you aren't that bad in the honeymoon phase, but when that phase passes and the issues aren't addressed what seems like little things can blow up into huge issues. Then there is the problem where the male half is pressuring the woman to get into the lifestyle and the woman is really only doing it to please hubby, this too can end a marriage or relationship. Either woman decides her hubby is not who she thought he is or the woman because enamored with her lover and this is where the problems lay. My advice to any couple thinking about doing this is, open communication and for the male half don't pressure the woman, and for the woman open up ( in a respectful way) about your feelings on your husbands request and if you are not feeling just say no and to the hubby accept no for a answer and move on. Don't ever pressure your woman, don't ever say "well if you love me" this is a sure fast way to divorce.