The Crown Prince's Spare Bedchamber Maid

Looking for Palace Intrigue Like Who Would've Thought a Housemaid Could Have Four Children and Become a Consort

Looking for books like "Who Has a Maidservant Who Bore Four Sons and a Daughter Yet Still Became a Noble Consort?". I want a harem palace-intrigue story with a clearheaded female lead who doesn't love the male lead. It can have non-exclusive relationships, and I want a few adorable kids.