My Dear, She Is Never Jealous

Oops, I accidentally traveled through time! Unfortunately, I met the scumbag emperor. But with good luck, I became a concubine at the beginning, and she was the one who was loved by thousands of people, so I felt more balanced. Who said I like to be jealous? Who says sister likes to be jealous! That's because... I won't tell you! No natal family? No power? Easy to bully? Ah bah! It doesn't exist. Didn't you see who is behind me? My sister is so arrogant, my sister is so willful!