What is the ruling of the Sharia on one who is lenient in her Islamic dress and sits with her husband's father?

The Quran and Sunnah command women to cover themselves and not display their adornments to non-mahram men, as the Prophet (peace be upon him) commanded his wives, daughters, and the believing women to draw their cloaks close around them, so that they may be recognized as chaste and not be molested. In contrast, the Messenger of Allah (peace be upon him) warned against "women who are clothed yet naked, inclining and causing to incline," who will not enter Paradise. He also warned against mixing with men from whom they are not forbidden, such as the husband's brother, because seclusion with the devil leads to temptation.