I was at a gathering last Sunday, and noticed something a little odd. The host is Chinese, and was very gracious and welcoming. Everyone there spoke English, and yet the host at one point spoke to her adult daughter in Chinese, in front of all the other people.
I couldn't help but feel that her motive was to keep from being understood by everyone else, and that perhaps she was talking about one or more of us to her daughter. Why else would she have switched languages?
She seems to be a lovely lady, and it struck me a little strange. How do you feel about bilingual people using another language in front of people who don't understand it?