Answer: Instead of experiencing the joy of gaining a son-in-law, Mrs. Crater feels the sorrow of losing her daughter.
Step-by-step explanation:
Irony refers to state of affairs which is contrary to what a person expects. The irony in the excerpt is beast described by the sentence "Instead of experiencing the joy of gaining a son-in-law, Mrs. Crater feels the sorrow of losing her daughter"
In this situation, the old woman would have been happy of she only Gaines a son-in-law but isn't his case, sh lost her daughter and hast even seen her for two days. Rather than being happy, she was sad.