The trick is to make it clear that you wouldn't tolerate that kind of shit even before it comes up.
You don't have to talk about it directly, but just be the type of guy that she wouldn't dare do that around.
You can always flirt with two girls in front of her for every one guy that she flirts with.
You don't have to talk about it directly, but just be the type of guy that she wouldn't dare do that around.
You can always flirt with two girls in front of her for every one guy that she flirts with.