What is the ruling of Islamic law on a man marrying a second wife without the knowledge of his first wife, and what is the ruling on his repeated lying to keep this a secret, and what is the way to avoid lying in this situation?

A husband is permitted to marry a second wife under the conditions mentioned in Fatwa No. 30688. Islamic law does not stipulate that the first wife must be informed. However, it is preferable to inform her to placate her, avoid problems, and safeguard rights. Regarding lying to her, please refer to Fatwa No. 40296.