JusSumBudi wrote:
This is the problem, she probably doesn't feel loved by you. It's a big problem with NT/AS relationships. That is also probably the reason why she slept with another man. She wanted to feel a connection with somebody. I think it would be bad for both of you to continue the relationship. She will continue to feel unloved, and years from now what will you tell you "adoptive" child? If the father of the child is unattached I would recommend advising her to try and make it with him.
If the kid does turn out to be your's it complicates the situation even more.
Way to blame the victim

"my girlfriend cheated on me" "oh, that's your fault"