You were being bad. Don't keep misbehaving like that.
You were being naughty. Don't be bad like that.
どちらもこのシチュエーションで「いたずらするからでしょ。いたずらしないで。」と言う時に使えます。
1) You were being bad. Don't keep misbehaving like that.
2) You were being naughty. Don't be bad like that.
「いたずらするからでしょ。」は
You were being bad.
You were being naughty.
と言えます。
naughty は「いたずらな」という意味です。
「いたずらしないで。」は
Don't keep misbehaving like that.
Don't be bad like that.
と言えます。
misbehaving は「悪さをする」という意味です。
ご参考になれば幸いです!