What is the Islamic ruling on a fiancé feeding his fiancée in front of her family, and does that affect their feelings, knowing that he treats his fiancée the same way in front of his family, and his father advised him that this is wrong?

The suitor is a stranger to his fiancée, and this behavior with her is not permissible, whether in front of your family or her family. For merely exchanging greetings with a young woman who is a stranger is a serious matter, so how about anything beyond that? And "the believer feels protective when the sacred limits of Allah are violated." The affectionate interaction between the suitor and fiancée, which is based on disobedience to Allah the Almighty, is something without good, and it may have a negative impact on the marriage in the future. We advise accelerating the completion of the marriage as much as possible.