Very early on Saturday morning, Regina, who was worried thinking about Jake's date with Haewon, went to his bedroom to see if he was back home.
She had wanted to speak with him after her call with Charlotte the previous day, but Jake had not been home then. And as at the time she went to bed, he still had not returned.
She intended to warn Jake properly against ruining their plan if that was what he had planned. There was no way she could allow her hard work of twenty-two years to go to waste because of whatever nonsense Jake had been told.
Ordinarily, Regina would have just opened the door and walked into the room, but she had to knock on the door since Jake had begun to lock his door since they moved to Korea.
No matter her objection to it, Jake had refused to go back to leaving his door ajar. He said he was an adult and couldn't leave his bedroom door open anymore, especially not after what Charlotte did three years ago.