If a women is in a room with men she knows observes kol-isha, is she liable for her voice being heard or are the men liable for listening?
If she sings and they go out, then no one was Oiver anything. If they refuse to go out then it is their fault. It might not be nice of her but it is their decision in the end and only they will be punished.
Shmuel Yaacovson 118
answered 5 years ago