[That's what gets Nana's frown to deepen. She cooks - and very well at that - and yet she hadn't inspected those skewers that closely.]

...and how do you know that? We're in a world where people turn into monsters, so who knows what other odd beings are out there.

[She's just going to turn and take the moment to actually look at those skewers. In the state they're in, she can't tell if anything is off with them.]