Max's eyes opened wide as she landed on her back with a slight 'oomph'. She watched him, body clenching instinctively at the realization that she was open to him. It was the only form of submission animals knew, the exposing of the belly, however, being mostly human, there was none of that and she was bring submissive by laying there and letting him do what he wanted.
Her legs spread wider, allowing him more room to maneuver. A sane part of her brain would have been yelling at her, if she wasn't so far gone. Still there was a vague sense of nervousness within her, he was another X5, god knew how strong he'd be. She had no idea how long it would last, but it had to be longer than a normal human. The idea of it lasting for so long and it being possibly forceful, excited her in some bizarre aspect, even if she never seemed like the sort to go that way.
Her hands clutched onto him as he entered her, drawing in a shaky breath. She watched him, instead of closing her eyes.