That is really sad. Her husband having cheated with another woman or more is harsh. Hopefully she doesn't stand by ignorant much longer her husband doesn't deserve her family status and protection. Grandfather is awesome!!
I'm sure she has some idea that her husband is cheating. No man will keep taking business trips without coming home. Unless he is cheating and depending on how many years he has been doing it. He might have a whole new family. This will hurt her.