I personally don't know these people or have an opinion on what she should do, I would be asking myself the same question. That said, I know someone who cheated and went on to have a normal family. She cheated on her husband multiple times, had a dry spell for a while, then became pregnant with her husband. She completely cut out the cheating when she got pregnant and they live like a normal family. I don't know if her husband ever had any suspicions. I'm not saying that at all let her off the hook, what she did was incredibly shitty and I don't respect her much as a person, but her son has a very happy life with his parents, who are happy together. That would be completely changed if they split up. I think a lot of the cheating came from resentment that she wasn't getting pregnant with him after trying for 8 years, and at that point she hadn't really grown up, she was a spoiled brat. That resentment disipated after having their son and she wanted to do anything she could to give him a good life.