A Long Island, N.Y., attorney can evict his daughter-in-law from the beach cottage she shared with his son prior to their estrangement, a New York state judge has ruled in what the judge called an apparent case of first impression.

Dawn Fasano, also an attorney, claimed she could not be forced to leave the Oyster Bay home, as she became a family member of Lawrence M. Lally when she married his son in 2001.