This particular woman has hard-wiring from her oriental cultural upbringing which essentially forbids casual sex, so she needs some kind of reassurance from him before she has sex with him. Once he gave that reassurance to her, and she felt the emotional connection was safe, she let him bang her.
I’ve known of off-the-boat Asian women who insisted on being in a Facebook-official exclusive relationship before there was any hanky panky. They come from shame-based morality systems, not guilt-based Judeo-Christian morality systems that westerners are raised in. Social appearances are paramount to actual behavior.
I don’t think the question is whether this girl is crazy, but whether the poon is worth the headache. If he wants the poon, playing the “high value aloof alpha” will disconnect her emotionally and she will move on pretty quickly. She needs the emotional reassurance to remain sexually available to him. This is the hallmark of anxious attachment styles.