What is the ruling on an uncle returning to his wife after eight years of separation, given that he provided her with very little financial support, and he is married to another woman who was the cause of the separation, and he visits her home without touching her at infrequent intervals?

It is not clear whether the uncle divorced his wife or not. If he did not divorce her, she is still his wife, and his separation from her does not affect the marriage bond. He must be just between her and his other wife and fulfill her rights. However, if he divorced her, she is a stranger to him, and he may take her back with a new contract if he has not divorced her three times.