model and specially expressions look good, already said by others but the precision to get some non-teasing feels very hard to get. Maybe some few moments of it has to do with the dick not calibrating well while travelling from outside to inside, since sometimes I got 3 consecutive pounds before getting teases by doing the same speed and distance.
I really really love how since it's a 3D model instead of 2D animation you're able to make her "readjust" instead of being idle with specific animations. Maybe you could add some other readjustment like arm positioning or how much open her knees are(although I don't blame you if you don't do it because it's your game and those are very small details)
Maybe in the future you can add manual camera changes, both to play with the "readjustments" the character does in this version already and to see the cumflation better (also to see the character details)
hope you keep on working on this