Cyanide churrs with delight, enjoying Killer's so far gentle massage. She's aware he's prone to unpredictable volatile behavior so keeps her gaurd up just in case, ready to defend herself ferociously.
Stewie watches Killer with an impish expression formed on his mug. He has the intense urge to go right up to him and plundge his small, scraggy biological daggers into one of his extremities for the heck of it. The sadistic little meerkat also wants to laugh at Killer's amusing cries of agony which is bound to be the reaction.