Exactly! And she's too self-centered. I don't think she has any experience. (mentally doesn't count)
No i mean, you can actually see that reflected in the game, girls have an experience valor for each action, for example, laura and emma start the game maxed out, storm is good at most things but has no experience with anal or footjobs, rogue and kitty are absolutely clueless, you can see that reflected in the dialogue of the actions, the ammount of pleasure points they generate by turn and in the case of sex, it hurts them during their first time and after that if youre too forcefull and they still have no experience.
Well given this, jean is inexperienced in all actions and it hurts her, the only thing shes actually experienced at its the psychic handjob, so with this said i make the case that ms. grey is if not a virgin, extremely inexperienced and is just pulling an act of being a super slut because she thinks is cool, yo.