If we are being honest.
The Prince has a good reason, she killed his brother; it was a set up, a good framing.
Her ruler betrayed her and the crown prince was used as a tool.
Huge difference with the other "Get with the murderer" where is a stupid prince's ego or is in the name of "Love" and never did a background check on the facts.
She did kill royalty, that alone is reason for execution.