naughty
adjective
°bad; tending to misbehave or act badly.
"There was a very naughty boy at school yesterday."
°risque: flirting with impropriety and/or bad taste; morally dubious, especially sexually suggestive, usually in a mild way.
"If I see you send another naughty email to your friends, you will be forbidden from the computer!"
synonyms: dirty, mischievous