When you agreed to a cuckold pregnancy, you thought you will be able to pass your child as your own. Your wife had different plans. It is important to her that everyone who looks at you knows that you are a neutered cuck through and through.
All her bulls get a fair chance to compete for her egg and fill up her womb. You're so lucky that you don't even have to compete. No matter what hapoens, you'll be the Dad. Congratulations, cucky.