Something not all cuckolds might be aware of is
Oxytocin.
It is a natural hormone produced in a man's and woman's body and is sometimes called the "love hormone". It is associated with sexual activity including hugging and kissing and orgasms as well as with child birth. It is the body's natural reaction to an emotional and physical event. It is more powerful in women than in men. Oxytocin is produced in the hypothalamus, a part of the brain and released during sex, childbirth, and lactation to aid reproductive functions. You can Goggle it on the Net.
It enables a mother to love her new baby. But it also brings about strong physical and psychological emotions during sexual activity including your wife falling in love over time with the man who has his cock buried in her pussy and filling her with his cream. And the more she has sex or physical contact with that person, the stronger her emotions will be. On the one hand this is the woman you want to see in bed with another guy, yet you fear you may have lost her.
I found that since my wife met her current boyfriend she is on cloud nine for two days after they have sex. He is such an excellent and powerful lover with a large cock and great stamina that she is basically a lump after he has left. Her mind is a million miles away. She is on a drug. And for those next two days I can basically do and have whatever I want. She will make me anything I want to eat, do anything I ask of her and is just a dream to be with.
So I sure love him pumping her full of his thick cream. I even thank him for fucking her when he leaves at night.
But, and there is always a but, those concerns many husbands have about their wives falling in love with her lover are real. The love hormone flows in her brain and body and she becomes single focused on him and how he makes her feel. And with time she will have less sexual contact with you and want it only from him as her bond grows deeper.
Now cuckolds who are in strong marriages are not so concerned about this emotional response as they believe their wives will not leave them, although they are prepared to be denied sex with her and willingly accept becoming the secondary or sub in the sexual aspect of his marriage. Indeed this is the basis of their humiliation/pleasure mindset. But if this is not what you want in your marriage, then you will have to control the amount of oxytocin flowing from her brain into her body because of her sexual contact with a specific male. This can only come about from regular communication and letting her know what you want while having to compromise with her needs. This is the cost of your decision to walk down the cuckold lifestyle path....it works well only if the marriage is already strong. Because cuckolding will quickly expose any weaknesses in a relationship.