外室 meaning in English

[旧时用语] mistress living outside

But and ben
外室和内室
She could only grasp all that awaited her when , walking over the red cloth , she went into the vestibule , took off her cloak , and walked beside sonya in front of her mother between the flowers up the lighted staircase
只是当她从台阶上的红呢地毯走过，进入外室，脱下皮袄，在母亲前面和索尼娅并排登上其间布满鲜花的灯光辉煌的梯梯的时候，她才明了等待着她的一切。