Is someone who cuts ties with his mother and sisters sinful if he fears for his daughters from their bad influence, especially since his mother goes out with men and his sister became pregnant out of wedlock?

If the corruption of the mother and sisters is established, the priority is to strive for their rectification through admonition, guidance, and supplication for their guidance. The man must protect his daughters from intermingling with them while they are in this state. As for abandonment (hajar), there is no harm in it if the benefit is observed. However, abandoning parents – especially the mother – has been prohibited by some scholars and permitted by others within narrow limits.