Must a wife maintain ties with her husband's family, who bewitch her and falsely accuse her, knowing that continuing these ties will lead to divorce, especially since her husband does not defend her and considers obedience to his parents his heaven and hell, even if it contradicts what is right?

The wife is not obligated to serve her husband's family or to visit them and maintain ties with them if they are not her kin, especially if she is harmed by dealing with them. The husband does not have the right to compel her to do so. However, her kindness to them and her overlooking their mistakes is considered part of perfecting kindness to her husband and embodying noble character. If she can do so without harm, it is preferable and better.