"Oh! I'm sorry. Are there other people living here?"

He feels silly now. Of course they would put more than two people in each house. The offer of tea is a welcome one as well, and he's a little quick to answer.

"Yes, I'd love some. Um, if it's not too much trouble."

Not having any money means he hasn't had anything to eat or drink since he arrived. Add that to all the walking he did to find this place, and he's actually pretty exhausted.