Tony's face pressed against her cunt was only going to make her want to rub up against him even more. The noises she was making was absolutely sinful and she knew that she was going to come too. Her body was starting to tremble just slightly. But as much as she wanted to, the sight of Kirk fucking him so hard and then pulling out to come against him was too much for her not to watch.
In fact when he came, he very nearly came on her face too. She had pulled back just enough, letting her tongue and her hand do the rest of the work for Tony, jerking him off rapidly until he started to come hard, and then while he was still coming in hand, she leaned down to lick the come off of his cock from Kirk and Tony kind of all mixed together.