Answer:
The most repeated idea in this passage is:
Sheila was accompanied by her mother.
Explanation:
The reasons behind the answer are: In the first paragraph we observe that Sheila is in the company of her mother for Harry's funeral. In the second paragraph, we also are told that her mother and she were invited. In the third paragraph, we know that she is still with her mother when Harry's family receive Sheila. In the fourth paragraph, we find out that she and her mother sat together in the church. So, this idea is repeated in the fourth paragraphs.