That type of situation is always a hard thing to sort out. If one party wants, and the other one don't. I always find it easier to work the couples slowly, finding out why the other person don't want to experience it or do it. This can actual take time, and whatever the final answer is no. Then you will have to accept it and move on.
If they are interested in trying it, then it's the time to be more open about the situation and do not try to push the other party too fast. We would need to push them as and when required. Make it look like they come to the decisions themselves and is willing to try it well respecting them.
If after they tried it and they don't like it still, there isn't anything much you can do. Unless you do it behind there backs, but that can course a lot more problems.
Other issues, I have find is how long would you work the couple before moving on, Months, years etc. How do you keep a balance between all parties involves, should you use force, co-horse them in to it.
There is a lot of factors to think about, and because each person is different. You will find that the way you work with each couple is different.
CBO
