MY wife wants ANOTHER child?

Ive been married for 4 years now and we have one boy.He's 2.My wife still wants one more and said if I get a vasectomy b4 we had a 2nd shed leave me.Im 25 and shes 26.I hate kids and she loves them.Ive NEVER liked children when theyre younger than 6.I dont wanna go through with the labor,Diapers,up at 3am,ETC.I also dont want to lose my twins.Anyway I just want to spend atleast 8hrs a day everyday with her and all she thinks about is kids.Whats a man to do?lastly I hate feeding.Is it wrong that I hate it.The reason is it makes the man become a role player and the child loves mom and knows not of dad.My first was fed for 2 mos and then I wuz able to bottle feed him and he loves me.If we have a 2nd Will there be a 3rd?Is a vasectomy wrong if she has another and i get it after?