Honestly she'll have to thank him later, being pushed to her limits and beyond is something she would never willingly allow anyone to do to her. In this situation she hadn't expected him to take control like he had, and she didn't expect him to be so willing to stretch her out so completely. There isn't a single part of her that he hasn't claimed as his own, and he isn't even as healthy as he could be. If they're going to do this again later, she's going to have to prepare for what he could do to her.

For now, his gentle movements and squirming all around inside of her are far, far too much for her to take as her whole body squirms and struggles against him while she comes a third time. She goes tense for several moments as her cock pulses, and then she falls limp, giving in to whatever he wants to do to her. Her muscles stay twitching and shivering, her whole body settling into an over-sensitized state. She can't focus on anything, save for the orgasms he's milking out of her. If he wanted to milk her dry, he'd have no difficulty now. If he wanted her to come back to her senses, he could stop, but really that was up to him now.

Meanwhile all she manages out between panted breaths is a long, trailing 'Oohhh my... god....'