Bluebelle's responses always seem so well thought out.
I'm just shocked that after living with you for 4 years with the intention of saving to buy their own place that there has been no discussion over that time about how close they were to achieving that. Surely they must have been to view properties and yet they didn't mention it, is that right. Usually, well going by my kids they would have been full of it and discussed every step of the move. I do find it odd that they have just sprung it on you, why do you think they'd do that ?