Explaining marital problems to children

What is the ruling on a wife whose mother is urging her to seek divorce?

Her husband is sterile and she used sperm from a donor and got pregnant. Does her husband have to deny the child is his by means of li‘aan?

She had a relationship with a classmate, and he has pictures of her. Should she ask him to give them back?

What should the wife say if she finds out that her husband is having a relationship with someone else?

They are suffering because of their father’s misconduct

How can I advise my son who is going to start school, about the dangers he may face, without causing him anxiety or making him afraid?

Obstacles to marriage: are they all valid excuses for young people who want to get married?

Should she travel and leave her sister who cannot take good care of herself?

Should they join their father in celebrating the Gregorian New Year so that they can get some money from him for their mother who is poor?