After the burning of Hourglass, you encounter MOTHER once again, but she's very angry about the fact you killed her children. And after a long speech, she says that SHE will kill you herself, and she will make sure of it...

MOTHER: You suddenly got teleported to the office, and when you take the monitor, you saw MOTHER making her way to your office! You could either hide on the attic or lure her away...