Secret Marriage in Islam

He got married without his family’s knowledge, and he wants to prevent his wife from having children until he tells his family; is it permissible for him to do that?

My husband is having an affair with a non-Muslim woman, and she has got pregnant from him

Her mother bore her from a marriage to a Christian man, and she is asking about the ruling on her relationship with her father and her non-Muslim sisters

Concerning obedience to his disbelieving parents, and attribution of an illegitimate son

Her husband’s father does not pray because he denies that it is obligatory; how should she interact with him?

His wife admitted to him that his children were from another man; what should he do?

Her parents are disagreeing and each of them is neglecting the rights of the other, and she is asking for advice

I do not want to get married but my parents want me to; am I Islamically obliged to agree?

He incited a woman to leave her husband, then he married her and claimed that her son from her first husband was his child