There will inevitably be friction in living in a community, but you can't see it if you are unhappy. If you really want to live so close, you can't pretend you don't know, which will cause more trouble and some privacy will not be protected. Therefore, relatives should not have things together, and good relations should not live in the same house. Something unexpected and unpleasant will happen. So it's normal for them to think so. I also suggest that you don't live in a neighborhood with them, in case relatives become unfamiliar. If you want some care, you can choose another neighborhood near their neighborhood.
After all, blood is thicker than water, and sisters are better than ordinary friends. Not only should feelings be maintained, but family ties should also be maintained.