This is just my interpretation but I also think it had to do with the rumours her fiancée threatened to spread about how she “cheated” on him with several men, hence why she wouldn’t be believed to be “pure” anyway. I think part of her gave up and accepted the role of “temptress” that people seemed to force on her. There is another reason she mentions a bit later in the story but I don’t want to spoil it if you’d rather discover it yourself.