Ha, cute. Maybe one day, if she can ever convince her sister to let her go past the castle courtyard by herself.

Or if she manages to sneak out the castle, with a little help from her friends XD
Wonder how frantic her sister would be next morning when she finds the well worded letter saying she's gone adventuring and not to leave the lights on for her as she may be gone some time. hehehehehe!

Her niece is the most likely culprit for that. Her sister's daughter is only a couple of years older than her, but every bit as full of mischief, if not more so, and I have no doubt the two of them get into all kinds of trouble together. As for sneaking out, I think the girls would probably find that hard going given that the Queen's Guard has standing orders to keep an eye on them at all times. Not to mention, big sister grew up in the castle and knows all the ways a pup can sneak out. But if they did manage it, big sister probably wouldn't have to do more than check with her mother, who is known for encouraging such shenanigans.