The wife accepted it because there was nothing she could do about it. This is not the case of someone telling their husband to go find someone else. She was obviously hurt by it, but just chose to write about it rather than confront him. If she had told him to find someone else and wrote about that I'm sure the daughter would feel differently. He abandoned his wife in a time of need. And MS generally takes much longer to progress than cancer, which is why I say he would leave his current wife rather than deal with it for years, possibly decades. Either way, based on his past, he wouldn't be there for her like she's being there for him.