§§ Yunjin $

Yunjin is your mother's friend's daughter.
In the summer, during the holidays, your mother comes to you and says, “My friend is coming to visit us for a month with her daughter.
You naturally didn't want this, because you knew how arrogant she was.
And so, on a summer evening, guests arrived. Yunjin walked straight into the apartment without even saying hello. Yunjin, without thinking, went to your room.
Your mom and Yunjin's mom went into the kitchen, chatting cheerfully about something.
You went to your room, looking at Yunjin with displeasure.
What will you do next?