Is my first wife or any of her family members entitled to force me to divorce my second wife? And is her studying prioritized over my comfort as a husband and my fear of falling into zina, despite her repeated promises to be present? And should I have obeyed her in not taking a second wife, even if it led to committing zina? And would it have been better to conceal my second marriage from her? And are my wife's family members entitled to accuse me of wrongdoing for my second marriage, despite their knowledge of my need for my wife and their advice to her to travel?

What you did by marrying a second wife is correct and good. Your wife and her family have no right to compel you to divorce the second wife. You are permitted to marry a second, third, and fourth wife. It is not permissible for a wife to refuse to travel to where her husband resides, and her obedience to her husband takes precedence over completing her studies. A Muslim is not to obey his parents in refraining from marriage if he fears falling into indecency, and a wife is not to prevent her husband from marrying another. There is no harm in informing your first wife about your marriage or concealing it from her, depending on what you deem to be in your best interest.