Was it the full body hug or the lean in upper body only hug?
Probably a better frame is to say something like, "Yeah, that's why I don't do one night stands. Too risky," or something like that. No point in talking about STDs, unless you can say that you just got checked and even then frequent checking just implies that you fuck a lot of girls randomly (otherwise you wouldn't need to get checked...)
This is some Asian thing. They don't have nearly as much of an issue with discussing bodily functions, like Westerners do. I don't think there's much you can do, but I'd be keen to hear other people's opinions.
Respect!
You should have tried to bounce her somewhere for isolation...
Glad you jumped on this opportunity, but you probably should have tried to engineer it earlier. For all you know she WANTED to be alone with you.
Instead, you should do some call back humor to bring her back to the positive state of the day 2, and talk about what you'll do when you see her tomorrow...show don't tell.
What SPECIFICALLY will you do next time instead? One thing though, always suggest the mom and the daughter are friends or sisters. The mom's LOVE that.
Great FR, and keep them coming!