Wiktionary
unfatherly
a. Not fatherly; unpaternal.
Usage examples of "unfatherly".
The Duchess now understood the unfatherly disregard Old Jimmie had shown for the ordinary welfare of Maggie.
He came around his desk and patted me on the shoulder in an unfatherly fashion.
She did not deny the act, but pleaded justification, alleging that her husband was guilty of unfatherly conduct toward his daughter.