Puppet Queen: the Prince Is Careful to Offend the Concubine

She was a neglected princess in the palace. She was forced to marry a dead vassal king. On her wedding night, she was forcibly married by a prince from a neighboring country. He promised to take her away, but he broke the contract and made her life worse than death and bullied. However, she killed the man she loved most with her own hands, so what about this great country? Without him, life would be like a puppet...