What is the solution for dealing with ongoing disputes between a wife and a sister, while taking into account the desire not to sever ties of kinship and the distress of both parties from not having their dignity upheld?

The Sharia (definition) encourages good companionship and maintaining ties between Muslims, especially among in-laws. Satan has sown discord between the sister and the wife, and he is keen on separating kin. Therefore, the questioner must try to reconcile them, and if lying is needed for reconciliation, it is permissible. If reconciliation is not possible, he should try to convince his sister to visit him at her own home to avoid problems with his wife. If the sister is not convinced, she has the right to visit him at his house as long as the wife is not harmed by this visit, and the wife does not have the right to prevent the husband's sister from visiting.