joyjoy, it must seem odd if you see her chatting away with a group of friends and know she chats to you on the phone. Have a think about the meal time, might it feel quite formal to her, is she sitting where she can see other people, is she comfortable physically, are there gaps in the adult conversation to let her get a word in? Did someone once tell her to be quiet at the table? Those sort of things. If there is nothing obvious then perhaps try to let her lead, it may be that she just doesn't want to talk while she is eating (not necessarily a bad thing) or she is genuinely bored by the adult conversation. Think I'd wait and see at this point. Just another thought, does she ever go to a friends house for a meal, if so perhaps a quiet word with the parents to find out how she behaves there, see if its different. Of course it may be that at times she just want to listen. I wouldn't worry too much, she has people who care about her and who want the best for her, things will change when she is ready for them to. Sometimes its best just to wait and see.