How old is your daughter? Is she living with you? If so, get her out of the house immediately! Leave! It is not safe to be there. Can you stay overnight with a friend? You have no obligation to stay with the molester. You can start legal proceedings later but leave the home now for your daughter's sake.

If your daughter is grown and gone, the immediacy is not the same. You can think about whether you want to press charges for what happened in the past, and also if you want to stay in the marriage. It would be completely understandable if you wanted out.

Good luck.