I am troubled by the lack of peace in your daughter's and son-in-law's home.

Often, it is difficult to connect two hard things, and we need something flexible to bond them together. Someone should explain to each person independently that the conflicts among them will subside through will and, over time, disappear completely. This does not diminish their image. https://www.torahrecordings.com/rebbe/igroskodesh/011/012/3799