An Old Guardian

In the first book, it briefly mentions how Lisbeth's guardian, Holger Palmgren, had a heart attack and therefore she was assigned another guardian, being Nils Bjurman. Well turns out, Palmgren is still alive and he has been trying to get ahold of Lisbeth for some time actually. When Lisbeth hears of this news, she goes and visits him in a hospice home to see how he is doing and catch him up with everything that has been going on. When Palmgren asks Lisbeth how she is doing, she assures him that she is fine and things have been going okay with her new guardian. Lisbeth has mentioned multiple times that Palmgren has been the only person she has come to trust so it still baffles me as to why she won't just tell anyone how she is being treated by Bjurman. Clearly she has some specific intention in mind for not telling anyone, but I just hope by the end of this Lisbeth gets revenge.