Accident or Not??

While reading the end of The House of Mirth, I believed that Lilly purposely killed herself, but after the discussion we had in class, I've been thinking about whether it really was an accident or not. I still have not come to my own conclusion, but I wonder if Edith Wharton even knew, and even if she did, I think what matters more is how each person interprets it. There is evidence to support both conclusions, it really just matters on what you want it to be, an accident or not.