I'm living in France with my French DH and our DC: DS1 (11), DS2 (7), DS3 (5) and baby DD. The DC were all born in France and have lived here their whole lives.
DS1 started secondary school in September, and since then I've noticed that he is becoming increasingly reluctant to speak to me in English in front of his friends. He'll shrug, grunt, avoid eye contact, etc. When his friends ask what we're saying, he'll just shrug and say he doesn't know.
Is it just the age?? He speaks normally when it's just amongst family, but as I'm the only English speaking influence on a day to day basis, he needs to keep it up with me in order to maintain it!