Answer:
The aunt disapproves of the bachelor's story because she disagrees with the moral message it gives to the children.
Step-by-step explanation:
This question refers to Hector Hugh Munro's story "The Storyteller".
Three children travel with their aunt in a railway carriage. Bored by the long travel, the children keep asking the aunt whole bunch of usual children questions, but the aunt's answers don't satisfy the children's curiosity. She decides to tell them a story, but the kids find it boring and the moral of the story unoriginal.
The man traveling with them shares the same opinion on aunt's storytelling so he gives a try. He tells the story about a girl who was so good that she earned medals for that and was invited to a beautiful park where no other kid was ever allowed. In that park she was atacked by a wolf. She hides, but the wolf hears her medals clinking, finds her and eats her. Basically, the story tells that the girl wouldn't have been eaten hadn't she been so good.
The aunt is shocked by the moral of the story and shows jer disapproval with it in this excerpt.