You know, people can be absolute assholes and never attempt to have someone murdered in cold blood. Plus, even from a cold logic perspective, why would she risk it? If she had ordered an assassination attempt and was found out, she would have earned the King’s ire, endangering her position, if not her life. And the MC wasn’t exactly a threat (not the first born, so unlikely to claim the King’s inheritance, and isolated among the family, making it hard to garner support), only a constant irritant. So, not worth it.
Of course, it changes if:
- the MC begins to get closer from the rest of the siblings (Leo could be dismissed as someone who wouldn’t have any real influence until a while, but Abigail? That’s a threat alright)
- the MC displays more and more signs that he/she intends to have an active part in the affairs of the Kingdom.
At which point, all bets are off.