There are 5 problems with this question:
Dating and marriage requires a "double coincidence of wants" where both you and your wife want to commit. (This is the whole reason that we stopped bartering because barting requires this for every transaction, and it sucks)
Your problem has a requirement of a quadruple councidence of wants: you, your wife, your friend, and your friend's partner need to commit. That is 4 problems.
Additionally you are over age 30. Once you pass that age, people are generally of the attitude of "relationship maintenance". So new friends are considered costly investments that have ongoing costs. (New Friends are neighbors or friends of your children/hobbies)
Here is a joke: why did Julius Caesar get stabbed? Because he thought he could have a friend after age 30.
Here is another joke:what miracle did Jesus perform that cannot be replicated? He made 12 sincere lifelong friends after the age of 30.
Loneliness is a contributor to early death and there are tonnes of products that want you to buy to alieve. Good luck!