What is the ruling on dealing with a woman who committed zina and agreed to marry the man, then threatened him with exposing the relationship to his family and her family, claiming marriage to him - despite the absence of a contract - and threatening to kill him, whoever marries him, and herself?

Adultery is a grave sin, and its expiation lies in sincere repentance through remorse, seeking forgiveness, resolving never to return to it, and performing many good deeds. Both individuals who committed adultery must hasten to repent. Their marriage is not permissible until after repentance and the woman's 'iddah (waiting period). After his repentance, the man must not heed the woman's threats and should take lawful measures to prevent her harm.