Looking for story about brother giving sister her first orgasm and then his mom

[jcs9200121]

This is a shot in the dark but I read this story probably 2 years ago. I remember I few key points:

• sister has never had orgasm
• It’s revealed that the mom has taught her that sex was not for pleasure and basically how to not enjoy it
• I believe they talk about this which prompts him to finger her on the couch
• As the story progresses they do more and she learns to enjoy it
• the sister then tells her mom about it and convinces brother to show mom how to enjoy sex
• 99% sure story ends up with m/s/d threesome

 

[OverconfidentSarcasm]

https://www.literotica.com/s/what-i-did-on-my-christmas-vacation

 

[jcs9200121]

https://www.literotica.com/s/what-i-did-on-my-christmas-vacation

THANK YOU!