I'm looking for a story I read here (I think).The story start with the son coming home, he gets taken by his bullies in their car and one of the bullies goes to the mom while the rest of them, with the son, listen to the bully, on a phone call, seducing the mom and have sex with her. I don't remember the name of the story and I tried, but failed, to look for it.
pretty sure you talking about this one? https://archiveofourown.org/works/51947626/chapters/131361241 but i am not sure anymore if they got inta a car. but i think remember the plot being rather similiar to what you described.
I think this is it A MOTHER FALLS PREY in Literotica by Visceral_Dreamer
havent read it yet, hopefully its goodhttps://www.webnovel.com/book/they-fucked-my-mom-on-my-birthday_24974421506707605###
New author with some short and sweet stories https://archiveofourown.org/users/extremecaptions/pseuds/extremecaptions
Can someone please recommend stories in which sister and mother both get fucked