The Monster in a Mask stands by the wall,

The Host suspects, but doesn't know. She just goes inside.

The Monster in a Mask goes with her.

The Host suspects, but doesn't know. She just goes through the hall.

The Monster in a Mask leads her.

The Host suspects, but plays along. She thinks they are friends.

The Monster in a Mask fools her.

The Host suspects, but obeys commands. She goes up the stairs, to the vanity.

The Monster in a Mask shows her.

The Host knows, and she falls dead.

She is the mask.