How did fernand marry Mercedes?

Fernand Mondego married Mercedes by exploiting the circumstances surrounding her relationship with Edmond Dantès. After Dantès was wrongfully imprisoned, Fernand took advantage of his absence and used his wealth and influence to win Mercedes over. Despite her initial feelings for Dantès, Mercedes ultimately succumbed to Fernand's persistence and married him, believing she would never see Dantès again. This marriage, however, was fraught with tension, as Mercedes never truly loved Fernand.