I assumed that is what most people do. In my sitch, the OM hasn't dumped her, but she is the one saying 'what have I done?'. I agree with your 'running scared' possibility. I don't know yet, but I do think that is quite possible.
With regard to the child, you are exactly right. It isn't that little baby's fault this happened and he/she deserves unconditional love. My two daughters get that from me. I just don't know if this baby would receive 'equal' love from me. I think if I can't get to that point, then it isn't fair to anyone involved to even consider it.