It's a good genre, nothing quite like the humiliation of an adult woman spanked by a younger man. It's difficult to come up with a good scenario where it fits.
I can only respond from knowledge of my own stories, but in "A New Uniform and a New Policy - Part 4" two waitresses find themselves spanked by groups of customers they have wronged, including a group of teenage boys.
In "Quarantined at Home - Part 7" our heroine finds herself spanked for swearing in front of an impressionable 14 year old boy. He's allowed to join in the punishment she gets for being a bad influence.
Both are under the author name LearningBare. The context of the other stories may help but they should be enjoyable as standalone if you like. | 
