Wendy,
You know that nobody here will cast the first stone.
Everybody has things in the past that they're not proud of. Or poor decisions made because of youth, inexperience in life, foolishness and or being drunk. Keeping a secret that long must have been quite strenuous.
Give it to the Lord and be patient. Let your daughter make the next move.
Take care of yourself and don't stress. Knots in a rope take time to untangle.
But, it's worth the time and effort in the long run.