Aimée got Cecilia to follow her to her car, always keeping an eye on her; it had been more of a struggle to get her to follow the Daeva than it should have been, so letting her escape would've caused Aimée to lose her already strained compulsure and probably kill her sacrifice on the spot, breaching the masquerade - more problems than she could handle right now.
The almost-failure bothered her the whole drive to her loft. Sure, Samael's curse was no more, but yet she couldn't shake the feeling of not being strong enough, not being good enough. If she was hardly able to control a simple Kine, how could she even dream of matching her own kind? The answer, of course was 'with Samael's help'.
With a grim look of determination she parked her Mini in front of her loft; she wasn't exactly looking forward to what was about to happen - although Cecilia made her somewhat angry earlier (euphemistically speaking), cold-bloodedly murdering someone to fulfill a pact with a demon wasn't exactly the most human thing one could do.
But I have to! It was a desperate claim from Aimée's humiliated mind and in a way this was probably just according to Samael's plan, breaking her down and making her dependent on him.
She led Cecilia into the living room of her loft, carefully locking the door after entering. With one hand gesturing at a expensive looking leather couch Aimée adressed her 'guest', her voice a bit colder but also more restrained than earlier. "Have a seat, you will be taken care of shortly." A look around the room told Aimée that the few windows were locked, too. Provided that Cecilia didn't plan another foolish escape attempt Aimée could get a knife from the kitchen, sneak up on Cecilia and get over with this without having to fight her much.
Of course, as she well knew by now, life wasn't always that easy.