that happens with any friendship, though, pixie. People fall out. We don't know what went wrong with this one, but even if it was purely caused by one person's actions, that still isn't immoral. An ex-counsellor isn't responsible for an ex-patient for life.
Obviously I feel sorry for tamaris's neighbour. But these things happen, and trying to find someone to blame seems pointless to me. The neighbour needs to find a way to get on with her life, and debating the actions of a friend and her baby is just a distraction.