My friend has one brother that her parents have always favoured. To cut a long story short, she found their will while staying at their home and discovered that they were planning to leave half their assets to him outright - which is really only their house but that is worth about £1.8 million - and half to her but her half is wrapped up in a complicated trust conditional on her behaviour. There is a strong likelihood that she will not benefit from this trust and will be unable to use its assets - the trust even specifies that she leaves the assets to her brother's children when she dies.
There is a possibility that she will have to pay inheritance tax on this legacy even though she may not benefit from it at all .
She is not a junkie, a drunk or married to Pete Doherty, she earns her own living, is quite a high achiever and very independent but her parents seem to be under the impression that she is feckless and cannot be trusted. She has tried to resolve this by speaking to them and her brother (who is sympathetic but does not do much to sort out the situation).
So, would you stay in touch with the parents or walk away now? Should she tell other people in the family what is going on? Her parents (and her db and sil) seem to expect her to take on the care of her parents as they become older.