traitress

But the Genie said, 'Nay, there will come a time for that, traitress!'

Ah, traitress; and thou art gone too; but I'll catch thee—thou shalt smart for this!'

So she had deceived him, after all; she had played the traitress from the very beginning.

The traitress displayed such cleverness that, before long, Tyltyl's disobedience became a very fine thing in his own eyes.