A little confused...

Last summer my husband and I were having problems... Issues we struggled with personally. My husband ended up having an affair and after it ended, the woman informed him that she was pregnant. The issue was that the woman was also married and her husband had been out of town only a few days prior to their encounter. This woman told my husband she was confident that this child was his, after he asked if she was sure it couldn't be her husband's. Throughout her pregnancy my husband would get updates from her and went to the ultrasound appointments because he was informed that there may be some issues with the child... The whole time, she refused to get a prenatal paternity test, even though she did test genetic testing. The whole pregnancy her husband wasn't involved at all.
Fast forward to present day, my husband and I worked through our issues. Not all is lost, and I didn't think it was fair to our son to give up on our family. Not everything is forgiven, not everything is fixed, but each day gets better. 
What I am confused about is that, my husband is black and Native American, I am Greek and our son has a golden tan complexion, with distinct features that don't deny that our son is my husband's child. This woman is white, her husband is Italian. This child that the woman claims to be my husband's look NOTHING like him and everything like her and her husband. He even has the same straight mouth and chip dimple as her husband (my husband family doesn't have those features). She doesn't see it, apparently. She made a statement that he doesn't look like my husband at all and she wants him to start paying child support without a paternity test. no money will leave our home to her without a paternity test, which is scheduled. If it proves my husband isn't the father... Does she apologize?     Do I forgive her? Do I feel bad for her? I'm confused and I secretly am hoping she has a hard time explaining this to her husband, who she already told wasn't the father... Is that bad?? 
Nothing negative about the affair or that I should leave my husband, as none you know us or our family. Just wondering if anyone has had that happen... And how they felt about it.