After Marrying My Ex's Uncle, He Spoiled Me Rotten

[Second-chance romance without getting back together + doting romance]

Her fiancé-to-be ran away from their wedding, and only then did Su Xi learn that she was just a stand-in. His one true love had returned, so she promptly broke things off and made room for her.

On the Nth day after their breakup, her ex-fiancé knelt in the rain. Su Xi walked right past him without a glance, arm in arm with her mature, handsome uncle.