Hm.. this was thought provoking for me. I thought of my ex, who was a "binge style" alcoholic and daily pothead. Tons of trouble and super irresponsible. She left me for someone 10 years younger than both of us... Before that *I* was the "next girl"; she left a relationship for me. I realized she is just following some sad pattern of using people up then finding the next fresh victim. This girl didn't even know my ex smoked pot - she'd been trying to hide it from her to put on a good face. I used to think what a big surprise the girl was getting when they moved in together! And the messes she will have to clean up, the blame she can take for letting her drink too much the night before... Just like her ex before me tried to warn me about but I was too smitten to listen.
Because this person was so toxic to me then, I could care less what she's doing now b/c I do not invite her into my life.