Until he was 50 years old my father did not know how his mother could see through walls.

When he was little his mother sat in the living room while he was playing with his sister in their playroom. With a wall and a hallway between them. But every time he tried to pull his sister’s hair or something their mother would shout from the living room for him to stop it. He was really angry and confused because he couldn’t fathom how she could see them.

On his 50th birthday his mother revealed that she could see them perfectly fine through the reflection in a wardrobe that stood in the hallway.

mirror/reflection

Yep, that’ll do it, altho its weird he didn’t see her. Mirrors reflections are usually bidirectional, no? Like if I see you <-> you see me usually…