Grice the teetotaler

From an online source:

http://jellicleblog.vox.com/library/post/in-other-words.html?_c=feed-atom

A: Uncle Chester is coming over for dinner tonight.
B: I guess I'd better hide the liquor.

Most likely implicature: "Uncle Chester has a drinking problem."

Caveat: "However, B's response might implicate,

-- Uncle Chester being a teetotaler, the mere sight of alcohol and its consumption offends him, right? -- and we wouldn't like that, would we? --.