What should I do upon discovering that my husband is practicing sodomy with a boy, knowing that he conceals this from me, that he is 40 years old, that he appears to people as religiously committed, and that this problem has been ongoing for two years?

This act is a clear relapse and a corruption of one's innate disposition (fitra). The perpetrator is accursed, as the Prophet (peace be upon him) said: "Accursed is he who does the deed of the people of Lot." He must be advised and reminded to be mindful of Allah, and that he will be a father, and that this abomination brings calamities, causes distress and sorrow, darkens the face, and removes modesty. It also causes dangerous diseases such as AIDS. If he does not repent, threaten to seek a divorce, as life with him will be a curse.