But only the second of the three reasons holds, and neither the first nor the third holds. The reason is simple. You can make sense. Even the second one depends on what kind of person this "she" is to determine whether it is established. Family reputation and her personal relationship cannot be equated directly.
Anyway, you should be in one place for the following reasons: 1. If she can realize that her family has a bad reputation, she can avoid similar situations in her later life; 2. If she is a diligent person who knows how to live and care about people, it will be a blessing for your life.
The key is: can you be sure of these things, or for how long?