Which piece of dialogue from the chaste adventures of joseph. a comedy most reveals madam potiphar's motives for
wanting her husband to replace his secretary, joseph?
madam potiphar. (coming in) oh, this is nothing--merely the room of one of the slaves.
madam potiphar (ironically) send for joseph? it would be useless. joseph has affairs of his own on hand always
madam potiphar "joseph" an ugly, foreign-sounding name, don't you think?
madam potiphar. (looking amusedly after her) silly little thing! (she stands there thinking )there's no doubt of it!
joseph did come from heliopolis last year

MADAM POTIPHAR (ironically) Send for Joseph? It would be useless. Joseph has affairs of his own on hand always

Explanation:

'The Chaste Adventures of Joseph: A Comedy" is a play written by Floyd Dell. It revolves aroun Joseph, Potiphar's slave and personal secretary, who seems to be in very bad terms with Madam Potiphar who, on several occasions tries to convince her husband to get rid of him.

During one of such conversations, Madam Potiphar ironically notices that, although a slave, Joseph is seldom at disposal and always busy with his own affairs. That is unacceptable behavior for a slave, according to Madam Potiphar, and a main reason for her wanting her husband to get rid of Joseph.