Could it be?

I came home to the following voice mail message:

Mom: A., it couldn't be that you've already gone to bed, at 10:23pm on a Saturday, could it? I've been cleaning and marinating mushrooms all day, I just got a chance to sit down.

***
Mom: Hello?
A.: Hi.
Mom: Where were you when I called?
A.: In town.
Mom: Oh. I've been dealing with the mushrooms all day. I'm exhausted. I just wanted to complain.
A.: That sounds rough.
Mom: You know, you could take the Chinatown bus up here...
A.: I don't think so.
Mom: I took it last weekend to NYC, it wasn't bad.
A.: I've taken the Chinatown bus before. It's been good and bad. I'm not going to risk eight hours each way of the bad.
Mom: We can discuss it later.
A.: Okay.
Mom: Goodnight.
A.: Goodnight.