What should I do about my fiancée who gets extremely angry and agitated when there's a disagreement, and threatens to end the engagement and leave the house after marriage, and how should I deal with her so that she respects me and gets rid of this habit? And does this characteristic of hers count as dissoluteness (fujur) that necessitates me leaving her?

The suitor is a stranger to his fiancée as long as the marriage contract has not been concluded. Therefore, if he is not pleased with her character, there is no blame upon him for leaving her and seeking another. If he wishes to reform her, it should be by guiding her to strengthen her faith, acquire beneficial knowledge, and associate with righteous women. If she becomes upright, that is good; otherwise, dissolving the engagement might be more appropriate.