She willingly kisses him on the way down, that does make it ambiguous.Colour Scientist said:Yes because saying no over and over again is so ambiguous, whether it's because of the location or the act she still explicitly resists.Boris Goodenough said:Just rewatched the scene 5 times, she opens one button and kisses him passionately at least once on the way down to the floor says: "Not here, it's not right, stop it stop it, stop it, stop it, stop, it's not right, stop right, it's not right... no, don't you, don't you!".
It does sound like Headey plays the role as if she abhores the location (big surprise), not the act itself.