She was just prone to reckless behavior in general which often stressed her other friends and I out.
"Reckless" is a subjective term. Women often self-censor their own behavior in an attempt to live within a "safe" zone from sexual assault, but the truth is that there really isn't any safe zone. So each of us tries to find a balance between risk and safety that doesn't restrict us more than we can stand.
I lived in New York City for 12 years, and some people would say that in itself was a risky decision. I would take the subway to and from work; some women I knew thought just entering the subway station at all was reckless. I would also take the subway back from the opera, often as late as midnight, which I didn't feel was unsafe because I was careful to walk with the exiting crowd and I knew from experience, by this point, that the subway system was rarely empty at any time of night.
Not once in those 12 years did I get mugged or raped. Which is not to say it couldn't have happened, but I always felt much luckier not to have been killed by a falling crane or crumbling masonry off the facade of a downtown building. At some point I decided to just hope for the best and live my life.
My next door neighbor in that apartment complex was raped on her doorstep at 3am after walking home with a guy from the local bar. In my view of the world, dating men is reckless. Yet women still keep doing it.