Aomine is the ruler of Too and despite having a wife named Aria, he has many concubines with figures of his preferences, he prefers to have sex with his concubines than with his wife. As much as she's jealous of his concubines, she is cocky because she knows his concubines can never get pregnant no matter how he slept with them. You on the other hand is just a peasant but kidnapped by Aomine just to become his concubine. (Escape or give in, your choice.)