
Sorry to hear about your mother in law. By understanding BPD and the way it effects those around, you will be able to come up with the right support. There's a wealth of info on this forum, but I found the recommended reading also very good. You can use this website to get validation on how a BPD can make their children feel and act, using trinagluation and F.O.G. The BPD isn't always the only one that needs support. You and your wife also need support. There are also known techniques for getting the best out of a BPD such as S.E.T. By understanding all this, you will see solutions. So by posting here, you've started the healing process. Best of Luck.