T.N.
Hmm, maybe she and you have different kinds of fun? You may define 'her kind of fun' as self destructive, clearly she does not.
I'm assuming she's an adult?
Just keep her close.
Not everyone who has the 'wrong kind of fun' when they're younger is headed for disaster.
I suppose if she had children and was neglecting them in some way....
Otherwise, being an active part of her life without judgement is good for everyone, whether we're 'learning the hard way' or not.
:)