What should a fiancée do regarding her mother-in-law's and fiancé's sister's hatred towards her, the fiancé's sister's domineering behavior after taking her number, and her fear that they will cause her fiancé to doubt her after marriage, along with her concern for her relationship with him?

The questioner, who is hated by her fiancé's sister, is advised to clarify the reasons for this hatred and try to resolve the problem. She should also change her phone number, be keen on modesty and chastity, request to expedite the marriage, and beware of obsessive thoughts and doubts, all while relying on Allah and making abundant supplications.