Siblings

I am watching a situation unfold, between my youngest (drama queen) daughter and her sister's from the other side of the family.  Since her dad passed away the atmosphere over at the other house has gone downhill.  There isn't much criteria to go by, where morals are concerned.  No one is acting right or using good sense when it comes to being upright, honest and moral.  She has been caught up in a moral situation, that will in the long run, cause much grief and hate.  I wish that there was something I could do to help, but it seems that time is the only healer.