Narrative tends to describe things, and eventually there will be the author's own point of view, and narrative is the focus of the article. Argumentative writing has a clear point of view, and the story described is mainly to illustrate this point, so it only needs simple expression. The account doesn't have to happen with you. As long as it is a description of things, if you think because you saw the story of mother's love, you can focus on the story description and explain your views, that is, your feelings, at the end of the article. If you want to prove your understanding of maternal love, those three stories can only be examples to prove your understanding of maternal love, that is, examples in the argument. It depends on your focus and writing requirements. I hope it helps you.