What hints? Sheriam was an inept loser, and Verin was trying to lie low. On the Supreme Council, she'd have to actively work for the advancement of the Black Ajah and help set the agenda. Verin's entire M.O. is to make people overlook her and underestimate her. She'd have followed enough orders to not get in trouble, but no more than that.

If you mean Sheriam's comment regarding the revelation of Verin as the source condemning her, that was so ineptly written and out of character, it can't be taken seriously.