The next time we see Ming-ling, she's still in love with him, but she doesn't seem to be having any fun with him. She's just trying to get him to stop talking about her, which is a good thing, because she'd rather talk about him than about her father, who's dead. Ming-li tells Ming-lan that he should leave immediately, because he's not a good guy, and he'll do anything for her father's sake, even if it means betraying her secret.
The next time we see Ming-ling, she's still in love with him, but she doesn't seem to be having any fun with him. She's just trying to get him to stop talking about her, which is a good thing, because she'd rather talk about him than about her father, who's dead. Ming-li tells Ming-lan that he should leave immediately, because he's not a good guy, and he'll do anything for her father's sake, even if it means betraying her secret.