I've had cats for years but my little girl cat (2 years old) is the cheekiest I've ever come across. Since a bit before DS was born 5 months ago she and her brother have been banned from DS's room. Previous to this neither of them had much interest in the room and the boy cat only had to be told a couple of times to get out the room before he got the idea that it was off limits.
His sister, however, who is a very clever cat, has developed an obsession with the room. At every opportunity she tries to sneak into it. I try to keep the door closed but at times, like this morning, I forget. This morning I saw her creeping up the stairs so I called her name. She meowed and stopped. Then began creeping again. Rinse and repeat. Then called her a third time, she turned, looked at me, said what I'd swear was "fuck off!" in cat and proceeded up the stairs and into the room! Of course as soon as she heard me coming up after her she flaked it back down the stairs again and gave me a very dirty look.
She is fully aware that she's not allowed in the room but she carries on chancing her paw. Madam. Any other cheeky cats out there?