@Glomoro
She didn't even know she has a "problem" till he said to her: "HUH? HOW COME YOU DON'T GO FULL AHEGAO WHEN WE DO IT? SOMETHING'S WRONG WITH YOU, GIRL!!".
And I'm not a puritan in the least, if he wanted to pervert her he should have done it on his own, little by little. But don't...