Are the husband's sisters considered kinship for the brother's wife?

The kin (Arham) whose ties must be maintained and whose severance is forbidden are one's blood relatives, both ascendants and descendants, and those connected to them from the collateral branches, such as siblings, paternal uncles, maternal uncles, and their children. The husband's sisters are not among the kin whose ties are obligatory for the wife to maintain, but it is recommended to maintain ties with them because they are kin to the husband and the children. It is advised to be patient in the face of harm, to possess good manners, to exchange love and respect, to seek the husband's help, not to despair of reconciliation, and to make abundant supplications.