Answer&Explanation:
An irony occurs when an author creates a situation in which the reader expects a diffrent outcome than what really happens in the next scenario.
Hughes which is the author of this book create an ironic situation in which we see Mrs Jones's reaction to what is an attempted theft of her purse.
Mrs Jones get violently and start kicking the boy (Roger), she picks him up and shake him until his teeth is rattled. She then takes the boy home stating that once she is done with him, he will recall Mrs Luella Bates Washington Jones.
By this time we are expecting that there is more and severe punishment to come to the boy.
Then she confuses us when she start to say "I got a great mind to wash your face for you." However, contrary to expectations, when Mrs Jones gets home , she then put every effort to actual indicate to the boy that he can trust her and she showers him with a lot of kindness, compassion and care , by showing that she understands why he wanted to steal by saying she can relate she also at the young age wanted things she couldn't have. She displays her kindness by letting Roger wash his face and comb his hair whilst she also given him dinner and further a 10 dollar fund to help him buy the blue suede shoes.