Cassie and Flint remained underwater, hiding from the members of the Blue Team. Flint was afraid that they wouldn't last long and lose oxygen.
But Cassie already made sure that they would be able to breathe under the water. She took advantage of this situation to kiss Flint all over again.
Without warning, Cassie grabbed his head, pulling him close to her. Then she claimed his lips as if she was giving him air for him to breathe.
But unknown to him, even without kissing her, Flint wouldn't have a problem breathing as Cassie already enclosed them in a barrier. Since Cassie got his mind preoccupied, Flint failed to notice that there was no water around them, inside that barrier.
Cassie had already bewitched Flint as he was no longer paying attention to his surroundings. Flint held her body tight, matching the intensity of her kiss.