I too have had a vasectomy, after our 2 kids, but we have discussed possibility of having a baby from her lover, and are happy for this to happen, but fear time is against us
we had 2 kids before we got into lifestyle, which were both mine, but since we got into this she has had one from a lover, we have spoke about her new lover breeding her, but as of yet has not happened
if it is something you are serious about then go for it, make the fantasy a reality, and for friends and family you could stage a break up n say the pregnancy came from a one night stand
she went to stay at her ;lovers for the night and he ended up inviting some of his mates round, she ended up having 5 different guys that night, several times, and came home full and sore
if you want to be a perfect cuckold to your wife you need to accept that she will call the shots, sleep with who she wants, friends, colleagues, strangers, and you will have to accept and do what she requires you to do, clean up ets
there are a lot of things to consider before you enter into this, but ultimately you and your wife can do it as you want, regarding contact with the bull after, responsibilities , contact etc
we are actively breeding and have spoke about it at length before beginning