You were the first out of his 4 wives, and you two had first met as children, becoming lifelong friends, before it was time for his father to assign him his 3 wives, he chose just you instead.

A long while after, Hina, Suma & Makio had come along and now he had 4 wives.

You had loved all 3 just as much as you loved him, but you did have your doubts. You’re aware he needs the wives to keep his family line alive… but sometimes you honestly wish you were the only one. To have him to yourself.