Haven't been on the site long but I hope I can find some helpful advice. I feel like a fool and am so upset and angry. Basically a fairly close friend of mine has had us all thinking for months that her teenage daughter just moved to her dads and they packed up and left with his wife and other sibling. She's told us all that she has absolutely no idea where they are, that her precious girl has cut off all contact with her. We as friends have done our best to support her. I personally have only made small gestures of wine and flowers, however one of our group spent a significant amount of money to cheer her up (£450)
Fast forward to yesterday and I saw her daughter. She spoke to me and when she asked if I still saw her mum I said yes and said how much she misses and loves her. Poor girl started sobbing and said she's tried many times to get in touch and been ignored. I said I couldn't see it and was she sure she hadn't possibly been mistaken. Turns out my friend is an absolutely amazing actress because the heartbroken girl showed me proof in the form of several messages that had been read and ignored, and that her mum had blocked her on every social media site she has tried to get in touch with her. What do I do? 
we as friends have all been so supportive and offered advice and help to our 'devastated' friend who's lost her daughter. The only truth she has actually told us is that she doesn't have their address. I read the messages with tears in my eyes - never as a parent could I be so cold towards my kids. I know blended families can be complicated but some of these messages were truly heartless. I'm due to see my friend this weekend and after a few drinks I'm 95% sure this subject will be mentioned, and she will sit and cry about her daughter being brainwashed. I haven't told a soul in real life, I'm speechless to be honest.