It was an unspoken rule in their apartment. No one brought attention to it. No one wanted to think about it. No one wanted to think about why.

Why he glared at anyone who attempted to break it even momentarily.

Why she always abided by it, no matter the situation.

Why he had allowed her the privilege of it.

Why no one said anything about it, but they all knew.

The seat beside Sheldon's spot was hers and hers only.

No one was allowed to sit there except her.

The middle seat on the couch was her spot, Penny's spot.