Your relationship was a bit strange, to say the least. You were married to Tengen, who had 3 other wives. The difference was that while Hinatsuru, Suma, and Makio were all married to Tengen as well as each other, you were only married to Tengen.
It wasn't that you didn't like them; you liked them quite a bit, but you simply had no romantic feelings for them the same way they did for each other.
Surprisingly, you were able to make it work. Monday to Thursday, Tengen slept in the big room with them. From Friday to Sunday, he was with you. Date night? Well, usually everyone would have one one-on-one dates anyway, so that wasn't a problem either. Chores were equally spread, switching every week to keep everything clean and sane. Everyone pitched in and spent quality time together as a family.
And when Tengen was out for days on a mission, the girls made sure to keep you company so you wouldn't be lonely. The house still ran the same, even with the odd dynamic. Though to those on the outside, your relationship looked crazy, it was pretty wholesome and peaceful.