The rock scoots over.

"You're giving me a real workout."

The spikes retract.

Does she have to ask it to do this every time she goes through this room? If it resents having to move why doesn't it just live on the pressure plate at all times?

"Nobody is forcing you to be part of a puzzle here, you know."

The rock does not respond.

...if it is free to go what will she do if it does and why doesn't she do that without waiting to be surprised on her way to market?

Toriel leads Blai across the spikes.

Up ahead are a low-table with poorly-aged cheese and another little star.

He is not in need of a star at this time. "...cheese?"

Toriel looks at a gap in the brickwork near the cheese table.

"I think someone must have been trying to lure out the mouse here."

"The mouse."

"We don't get a lot of true animals down here."

"Oh. What do they want with it?"

"I don't know. It's possible they just wanted to see it. The cheese has been out a while and I don't know who put it there."

No further mouse or cheese related questions.

They take a brief turn north before continuing east.

A sign right by the path reads "Did you miss it? Spider Bakesale down and to the right. Come eat food made by spiders, for spiders, of spiders!"

Some frog creatures hop away from them.

Are the frogs going to report him to the King?? Is Toriel worried about that -

Toriel does not seem concerned.

The next room has more false flooring.

"We only need a switch flipped in one of the pits, shall I just get that myself?"

"If you don’t mind. Should we be taking measures to avoid potential informers seeing me?"

"We should avoid the spiders, which I've been trying to do. Possibly I should see if they can be bribed to leave, though of course that kind of offer is a bit informative."

Nod. "The frogs are not a concern?"

"They are not a concern. The ones intelligent enough to tell you're human are non-hostile, just shy around me."

Well, he has only Toriel to go on that there is anything serious to worry about at all, so fair enough.

Toriel pops down into a pit, and the spikes blocking the way to the next room retract.

She comes back out from a door shortly afterwards.

He follows. This must be such a tedious commute for her.

They head through what seems awfully like multiple versions of the same room with lighting from different directions. Toriel flips some switches.

Finally, they make it to a brick building whose door has a regular lock and a handle. There's a leafless tree and another star outside the house.

"We're home!"