I would define naughty as (comparative naughtier, superlative naughtiest).
risque: flirting with impropriety and/or bad taste; morally dubious, especially sexually suggestive, usually in a mild way.
If I find more naughty magazines in your room, you're going over my knee as scantily dressed as the naughtiest picture!
(archaic) evil, wicked, morally vicious
wouldn't you ?