I've been seeing this Ukrainian girl for about 3 weeks. She comes to my place and I fuck her for hours. She tells me how great I am in bed, how amazing it is and how perfect my body is. She's really into it and she often says things like "Wow that's new.", "Nobody has ever done that with me." and "I love that you can just take me." She clearly loves it and keeps initiating for more.

In an online conversation I was trying to set up the next meeting so I got ready to shift to a flirtatious tone but then this weird exchange occurred:

[We were talking about something else.]

Girl: "well at least you are nice to me"

Revenge: "i don't remember being all that 'nice' to you last time..."

Girl: "what you did last time, that was rough"

Revenge: "what was rough?"

Girl: "you pulling my hair... it was sexy rough."

[It was the first time I'd done that, and she actually said "oh yes Revenge, pull my hair"]

Revenge: "yeah. that happened."

Girl: "you being in control... i like it"

Revenge: "i need that."

Girl: "why?"

Revenge: "Not sure if you need to know."

[No idea why I said 'i need that', and at this point I've lost frame and don't know what answer to come up with. The real reason why I fuck her this way is because well, TRP, and we enjoy ourselves. The images that were flashing through my head prevented me from producing logic. She begs me to tell her. I'm wondering why she needs to know all of a sudden, after weeks of being super-submissive. I feel like an idiot for allowing this to have become a conversation topic and after some blahblah I end up saying:]

Revenge: "it's on the mystery list."

[She gets mad at me and says that she resents the mystery list that I've actually only just invented. I don't reply and after a few hours she writes:]

Girl: "well, what I wanted to say before was that I like letting you be in control..."

Girl: "i like having a strong man tell me what to do sometimes.. it's so sexy."

Girl: "but sometimes"

Girl: ":)"

Revenge: "You're very emotional today aren't you."

Finally, here's my question. I know it was my fault that she asked "why?" but why is she shifting gears later, saying this "sometimes" crap. She's obviously enjoying herself plenty. Is she getting ready to try and tame me? Was she retrospectively thinking maybe the hair was too much after all?

I'm thinking about female psychology and mating tactics, maybe she's planning on making the sex she thinks I love/need, more scarce to try and start controlling me?

Some opinions would be much appreciated.