Hello Its not easy:
Ok...........getting my crystal ball out.........shining it up..........looking in the centre.......what do I see???

I see.............a lot of fog.
Personally, I don't understand relationships like the one you have with this woman because I think I would, as a female, feel like a piece of meat in it, and if I were a male, I might feel like.......a piece of meat.

But...........to each his own. I'm a great believer in freedom and choice but also......respect. I think your relationship with this woman lacks basic respect. Maybe that's why she has no problem making such comments....because she's not feeling like she's in a respectful place to begin with and vice versa???? Just guessing.
My vote: talk or walk.
6 months seems long enough to be uncommitted. Soon it will start to feel like a committment (which there isn't any but it might begin to feeeeeeel like there is or should be). You say you've grown "fond" of P.
Does that mean you feel emotionally attached to her? Will it hurt to walk away? Will it hurt if she walks away with one of those "gorgeous" guys she spots? Could this be a fear? Are you feeling more ready for a committed relationship with someone? Is this woman.....the long term relationship kind? What are you doing to yourself?
(I ask waaaaaaaaaay tooo many questions....so please only answer here if you feel like it......otherwise....maybe just think about them and see how you feel.....what you think or nevermind).
Maybe I'm out to lunch (wouldn't be the first time

) but it just seems to me that you have feeeeeeeelings for this woman (fondness??) who you agreed to only have a sexual relationship with, without further ado (is that how to spell ado??

Probably not).
Have you broken your end of the bargain?
If so......tell her.... or end the thing before you get even more involved with someone who does not wish to get more involved. It just seems like a dangerous game to play eh??

Sela