Yes, there could be appropriate stories. For example, a woman who is a swim instructor might observe a boy's swim class to ensure the teaching techniques are effective and the boys are learning properly. Or perhaps a mother watches her son's swim class with pride as she sees him gain confidence in the water.
Sure. Consider a female coach who is hired to train a group of boys in a swim class. She has a great influence on their progress. She not only teaches them the technical aspects of swimming but also instills discipline and a love for the sport. The boys look up to her, and she enjoys seeing their growth and development in the swim class.
There can be stories where women are involved in a boy's swim class in positive ways. Maybe a female volunteer at the local pool helps out during a boy's swim class, providing support and encouragement. She might be there to help the boys overcome their fears of the water or improve their swimming strokes.