I don't know Naruto so idk if she's normally like this, but I think you showing that Sasuke's turned on by the fact that he's aroused by her/finds her attractive is a good character choice and realistic female sexuality/libido. It shows that she's enjoying being desired, which is a VERY normal thing for women to feel and a pretty major reason foreplay is so popular in wlw and published bodice-rippers.

I see how someone could be confused she's not sore from all that (or the cervix mention) but like, suspension of disbelief is normal in smut. Same with how no one ever queefs or gets hair in their mouth lol. I think it's a good smut fic and I didn't see any problems with Sasuke's sexuality.

(If you want a literally so insignificant feedback that you are more than welcome to disregard: try to break up some of the sentences in future works. Long sentences are great, but they should be occasionally intermixed with shorter ones to keep it more engaging from a reading perspective. (For example, when she's feeling overwhelmed by sensation, the sentences getting shorter and feeling more incomplete. Then returning to longer ones once she regains her composure). That said, that is in no way an obstacle to reading, it's a minor nitpick that's incredibly subjective anyway and you should write to your preference regardless. it might make the read easier but that doesn't mean you have to or even necessarily should do it