3 adjectives to describe traitress

On the next page Lamb copied the "Farewell to Tobacco," adding:"I wish you may think this a handsome farewell to my 'Friendly Traitress.'

"Thou little traitress!

"Can my mother have been betraying us?" "Oh, she has been a sad traitress this morning, betraying all kinds of secrets and misdemeanours," said Mr. Howard, laughing, and casting on Ellen a glance of arch meaning, while Edward could scarcely contain his impatience to seize his sister's arm and bear her off with him.

3 adjectives to describe  traitress