Faith didn't need as much oxygen as one might think actually. It was really the last thing on her mind when he was kissing her, and she was obviously getting all of her pent up frustrations out on his mouth. Not that she was overly violent but it was obvious that it had all worked her up pretty bad. When he pulled his head back to kiss against her neck she finally realized she needed air, gasping for it for a second before she let her hands slide down his back.
They didn't stop there, they went up under his shirt. She figured somewhere in the back of her mind that he was going to pull back and apologize and all of that sooner than later. So she was going to get in as much of this as she possibly could while she had the chance. She was grinding against him, unable to help herself when she was in this state, fingers stroking the skin of his back as she gave a half growl as he bit down on her neck.