Reborn as a Pampered Daughter

Before her rebirth, she was a legitimate wife but was demoted to a concubine by her biological sister. Her mother-in-law didn't care for her, her husband-in-law didn't love her, and her sisters-in-law and relatives came to bully her. My younger sister was originally a concubine in the family, but she seduced her husband and rose to power. Pregnancy, miscarriage, frame-up, no one believed her, and eventually she was kicked out of the house and died tragically at the hands of her own sister. After her rebirth, time goes back to when she was demoted as a concubine. It doesn't matter that she was originally the legitimate wife, or she was framed by someone, and now that she is a concubine, she can still play with her enemies and settle old and new accounts together! Whoever insults her will be rewarded twice as much! Whoever bullies her will be served a hundred times! Who betrayed her...