Do the relationships among wives of the same man fall under the "womb-kinship" (silat al-rahim) that is suspended from the Throne?

Co-wives are not considered among theowy [dhawu al-rahm] whose kinship ties must be maintained. However, they are included in the general kinship, which is the kinship of religion and the brotherhood of faith. This kinship necessitates continuous adherence to faith, loving its people, supporting them, offering them advice, refraining from opposing them, acting justly towards them, and fulfilling their obligatory rights.