In the short story The Magic Barrel what caused Stella's father to regard her as dead?

Salzman tells Leo that the girl in the picture (Stella) is wild. He considers her to be dead to him. The story does not explicitly reveal what wrong Stella has committed. However, given Salzman's Orthodox approach to Judaism, her offence could be as "minor" as a refusal to adhere to a traditional Jewish lifestyle, or as serious as prostitution (which is suggested by her brazen stance by the street light at the story's climax.