Q:
Is it permissible for my maternal sister to marry the son of my paternal sister,
even though my two sisters are cousins?
A:
It is permissible for your maternal sister to marry the son of your paternal sister, even if the two are cousins, as long as there is no impediment making it Haram (prohibited). May Allah grant us success. May peace and blessings be upon our Prophet, his family, and Companions.