My DD who is almost 14 has descended in recent months into a moody teenager who spends every available minute on Facebook. At mealtimes, she escapes from the table at the earliest possible moment, muttering that she is going to get on with homework. But little homework gets done and instead she is usually on Facebook chat. We all used to watch an hour of TV together in the evenings but now it's just me, DH and our two (older) DDs (neither of which had much of a moody teenager phase). She hides away in her room.
She has just got a BF (nothing too serious I don't think, I hope not at 13 anyway!) but her grades at school have plummeted. She no longer likes physical affection, just stands there and will slip out the house without even saying goodbye properly if she can. Often when I speak to her, she will push me out of her room or shut the door on me. Her sisters say she never speaks to them either. Things were bad at the end of the summer term but got better when all 5 of us were away (no computer access) and spent lots of time together; same happened at Christmas.
From reading some of the threads on here I realise this is not the worst teenage behaviour but I feel I need to act quickly to nip it in the bud and regain some control/direction for her. One major problem in the past has been that because she never used to go out with her friends, I couldn't use that as a stick/carrot. Plus I have considered turning off the router (to stop wifi signal) but others in the house are also doing homework using the internet so that is not usually an option.
Any ideas? Is it likely to pass or get better? With two older ones you would think I would know but me and DH get on so well with them (15 and 17) and I think we have escaped the risk of teen crisis with them.