Laura, my thoughs are with you. i am very sorry you went through what you went through. i don't think you are a bad person, and i hope you will come to see this. i hope that in time you will find healing.
this topic has gone a bit 'off topic'. i think that what kypros said has been twisted a bit. i see what he is saying. i'm sure knowing your wife has had an affair and dealing with that in itself must be a pretty difficult thing. to have to see and raise a baby that was conceived with another man must be like a kick in the stomach every day. for him to admit he would never be able to love the child is a very honest thing.
however that is not to say i condone what her husband said and did. it may have been honest but it was cruel and it was heartless. it represents what a lot of people would feel though.
i think people place far too much emphasis on having a child that is 'their own'. though i can understand this wish (it is a rather primal thing) i think it is wrong. a child cannot be held responsible or accountable for who its parents are. i think a person who will not love a child simply because it is not their own flesh and blood is selfish.
when people are trying to conceive, if you ask them why they say 'i want a baby'. the term 'i want'. it should not be about wanting, but about what is for the better good. i think that tyring for a baby simply because you 'want' a baby is an immoral thing to do in this day and age. me and my partner both believe this. the world is overpopulated. there are so many children that need to be adopted and/or fostered. to adopt or foster would be a wonderful thing to do. it's my opinion, anyway.
wow i just went even further off topic. to return to it... Laura, i think this is too much for you to have to deal with yourself. i think you should look into getting counselling (maybe group councelling for women in similar situations?) . i hope you learn to come to terms with your loss.