Must one tell one's family or one's suitor about having practiced masturbation in the past, or is that considered a breach of the cover Allah has granted?

If a Muslim falls into sin, they must conceal it and not expose themselves, for Ibn Abd al-Barr said: "Concealment is obligatory upon a Muslim regarding their own person if they commit an indecency." Therefore, do not tell your fiancé or anyone else about your past masturbation, and conceal yourself. As long as you have repented sincerely, do not dwell on this matter, for repentance erases what came before it, and "the one who repents from sin is like one who has no sin."