Is a girl considered chaste if her stepfather assaulted her in her childhood?

What your stepfather did is a reprehensible sin, but you are not to blame for it, as you were young. Do not worry and you must conceal yourself, and do not tell anyone. If your hymen was broken due to this assault, do not tell your future husband the truth. You can use equivocation in your speech, because the hymen can be broken without intercourse.