How old is she? Is she still at home? Stay out of her business. Rifts can happen at any time even if you were good friends. If you have tried ans she refuses then maybe it's time to drop back for a while. As she matures things will change. Just be patient. Just be sure to let her know she can not disrespect you or your home. Period.
ignore her, I do I let my son rant, he is disrespectful at times. just walk away from him, I get quite, let him think. see how he is acting--sometimes... he is so much like my ex I can not stand it. [husband]