What are the consequences of a man divorcing his wife after he found her picture with another man, and she told him that he was her maternal uncle, while her brother denied that?

A husband should not divorce his wife merely due to suspicion of her lying, or his hastiness in divorce before verifying her conduct. If the husband becomes certain of her wrongdoing and her behavior has been good, he should forgive her if he finds nothing suspicious from her, as she might have erred and then repented. However, if the husband finds something suspicious in her actions, then there is no blame upon him for divorcing her.