It's really no problem.

[He wouldn't have offered in the first place if it was!]

I know what happened to you is probably pretty frightening, but if a warm meal can help you feel a little more normal, then that's the least I can really do.

[He's not... great... at comforting words. He can listen to whatever worries Zenitsu feels like sharing, but he's also way too nervous about overstepping to really press him to share.]