Reuven does some work for Shimon who has 3 wives (explained later). The bank refuses to cash the check so Reuven goes back to Shimon for alternate payment. Shimon insists on paying extra on account of the delay. Reuven refuses the extra on the grounds that that is Ribbis. Shimon's wife ______ takes some of her own money and offers it to Reuven.
Wife 1: Dinah - she has no income and Shimon provides for her. Whatever she acquires becomes Shimon's. Shimon has already given her some money for discretionary spending.
Wife 2: Asenath - she has her own income and Shimon doesn't provide for her. Whatever she acquires is her's.
Wife 3: Rahab - she is not Jewish and there are no unexpected automatic halachic ownership changes.
Which, if any, of the wives may pay Reuven the extra? If none of the wives can pay, is there a person that can?
I would think that Dinah couldn't because her money is Shimon's money.
Asenath couldn't because even though she has her own money, they are still married and <\incoherent thoughts>
Rahab might have the same impediment as Asenath, but there also might be a mitigating factor that since she isn't Jewish they aren't married and she is considered a stranger and any tit for tat is incidental. <\more incoherent thoughts>