Is it permissible to speak with a fiancée who is a relative, with the approval of both families, and is there any Sharia violation in that?

A young man is advised to stay away from conversing with a girl, as it may lead to fitna (temptation, discord) and unlawful acts. If he wishes to marry her, he should propose to her and complete the lawful marriage contract. Speaking with her can lead to dire consequences and is among the steps of Satan. The correct solution is marriage, as stated in the hadith: "Nothing like marriage is seen for those who love each other." The Prophet encouraged young people who are able to marry, due to its benefits in lowering the gaze and protecting one's private parts. There is no concept in Islam of what is called a "relationship" or "dating" between genders with the intention of marriage. Islam has blocked these paths because of the corruption they contain, and it has prohibited following the steps of Satan. Conversation may lead to unlawful seclusion (khalwa) and forbidden looking. It is not permissible to converse with a girl with pleasure before marriage, even if her family approves.