The Princess Is Very Young and Scheming

This is the story of a bastard who behaves like a coquettish person after being reborn, and then is bullied and counter-bullied. An Ning was reborn when she witnessed her fiancé cheating on her childhood sweetheart. She traveled through time and became Princess An Ning, the eldest daughter of Prince An's palace who was betrothed to the prince in marriage. Although this prince is very majestic and upright, he is attracted to a gentle scholar who likes his bad cousin. What should he do? So is this marriage an escape? Or half-assed? Was he pushed down? Or push back?