You don’t have to explain your hard year to everyone who asks why your grades dipped. A short answer is fine.

A question does not come with a right to the full story. People ask about a dip out of mild curiosity and are usually satisfied by something brief, which means the detailed version is a cost you have chosen to pay. You decide how much of a difficult year gets handed over, and to whom. A short answer is not evasive, it is proportionate to the question.

Decide on your one-line version now, before somebody asks and you improvise under pressure. That it was a hard year at home and things are better now is plenty. Save the full account for the few who have earned it.