What is the way to deal with a paternal cousin who threatens to ruin the marriage, and with an envious female friend who might reveal secrets to the fiancé’s sister, given the family's rejection of the paternal cousin and their approval of the fiancé?

If a suitor is religious and of good character, and mutual acceptance has been reached between the two parties, then one should not pay attention to anxieties or consider a paternal cousin. Instead, one must rely on Allah and have a good opinion of Him, for whoever relies on Allah—He is sufficient for him.