To be realistic, your fantasy could end up being just that and not reality. Obviously the cuck/hotwife lifestyle is not for everyone and trying to ******* it on anyone would end up only badly. You can encourage it and see if it goes anywhere but be aware that it could end up just being a fantasy
For a man that is already married and wants his wife to engage in this fetish purely for
HIS sexual gratification and not hers, typically does not end well. Most women do not understand why their husband would want another man to have sex with her after they got married. If there is no current open honest discussions and never any open honest prior discussion or agreement regarding their roles and boundaries, it's destine to fail. With out this honest and open communication, the intimacy part of their relationship will break down. Occasionally a wife will go along with this cuckold relationship to please her husband and or her self because she has an open mind and a realistic need to be satisfied. Unfortunately when there is no open and honest discussion or communication about each others role, it usually spells disaster. She discovers she harbors resentment towards her husband because he still wants her to respond to him as her man. He is not willing to give up his role and become a submissive cuckold, now she feels torn between two men, when realistically her husband is a inadequate cuckold. More often than not, she takes off with the other man because she needs him to be satisfied and there was never any confusion as to his role as the man.
On the other hand:
The good news is that most relationships that have had life time success with cuckolding are the ones where both the husband and wife, boyfriend and girlfriend, expressed their mutual interest with the over all concept before even getting together in a life long commitment or currently discussing all the details before they hop into it, meaning you have a absolute mutual agreement. You both talked, agreed, discussed boundaries, what roles each one would have, both had clear communication beforehand. Usually when the man will assure his partner he will accept his role as a submissive cuckold, he is willing to serve the wife / girlfriend and her lover as they mutually see fit. When the lover knows these boundaries coming into the relationship as the alpha male and is committed to assisting the wife /girlfriend in training the submissive, he just naturally takes his role and makes the wife / girlfriend his woman. At this point he knows what is expected of him and the submissive husband or boyfriend knows that if he wants to be actively involved, he must always put his wife / girlfriend and her lovers needs first, before his own. He must realizes his place in the pecking order. Additionally he understands there are consequences when he is not being totally submissive as he should, according to his wife or girlfriend. This is not for everybody but it can be a successful guideline and add your own personal thoughts.