The successor would want to nip a bad bud early.
That bitch would pull off such a plan.
"Wouldn't it be something like, 'I am the next queen. I need to prevent my younger sister from somehow taking the seat'?"
"If it's elder sister......maybe."
"Well, I'm not denying that possibility."
"Since the old days, mother would tell me not to imitate my sister in entrapping people to get whatever she wanted.