If the latter was the case, her children would be the members of that congregation and “the children of [her] sister ” would refer to the members of another congregation.
وفي هذه الحالة ،‏ يكون اولادها اعضاء تلك الجماعة ،‏ و ‹ اولاد اختها › اعضاء جماعة اخرى .‏