Is it permissible for adult sisters to physically fight and engage in physical contact, and if it is permissible, must a wife continue to do so despite her husband's disapproval?

Obeying the husband takes precedence over obeying the parents. As for quarreling among siblings, even in jest, it involves several prohibitions, including: anger, which causes resentment and animosity. The Prophet, peace and blessings be upon him, advised against anger. Another prohibition is physical contact, which might arouse desire, especially between a male and a female. Additionally, the husband's dislike of such jesting is a factor. Therefore, the wife must obey her husband and refrain from this jesting so that their relationship does not deteriorate.