Q. If one’s non-frum close relative dies, such as a mother or father, and their home is not an appropriate place to sit Shiva, due to the lack of understanding of the laws of mourning, may one sit Shiva elsewhere?

A. Horav Shlomo miller Shlit”a opinion is that in principle one does not have to sit shiva in a location where the Rabbinic halochos and traditions of mourning will not be kept properly. However great common sense and reason should be used to avoid machlokes, quarrels and disputes in times of grieve, that could tear the family apart and create a Chilul Hashem (Biblically prohibited)

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a