Where S watches M getting banged

Stories similar to

Home run by sa2222
Soccer mom versus bully
Mom versus bully
Mom's night in the van by mark east

It doesn't have to be bully.

Also m giving s birthday present.. Best example is The Present by sex4every1. Whole day broken up into sessions and a matter of fact,, raw tone.

What are you wanting? Might be better if you post a link to the story. Or are you just advertising it?
Inquiring minds wanna knowKant