Originally Posted by
GlassPrisoner 
but then called me later in the day and told me she's dating and wanted to keep it hidden from her sponsor and the group.
Check my motives.....I have been.
As a friend, I would of asked her... If nothing is wrong with what "he" is doing, why does "she" need hide it?
Guide her to check her motives.
As a AA member looking out for another AA member...I would say that they have both made a choice and will need deal with what comes of their choice...good or bad.
You did your part and helped in the best way you know how. The choice is their choice to accept your wisdom or do things their own way.