SOD is here to support sisters who love their brothers! So we have the brother and sister go on a date and mix an aphrodisiac into the dinner at the inn! When the brother is taking care of his sister who has a fever, his dick reacts to her hot body and they end up having incest! The feelings he had been holding back until now explode and he can't stop thrusting! The sister is overjoyed when he cums inside her and they live happily ever after!