My husband married secretly without my knowledge. What can I do?

Your shock and hurt are natural; verify the facts, then seek advice from the religious affairs office or a Syarie lawyer about your options. First, make sure the information is true and not rumour. If the marriage took place without court permission (for example, abroad), it may be an offence under state Islamic family law. You are still a lawful wife with all your rights — maintenance, rotation and housing. You may claim those rights, apply for counselling or sulh, and if there is harm, apply for fasakh or rely on the taʿliq. Avoid rash actions such as confronting the co-wife or exposing matters on social media. See secret polygyny.