mom son adultery and incest similar sotries

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are there more stories like where son accidentally sees his mom having sex with unknown person and enjoys watching it

then mother find out that her son knows her secret and explain to him that its natural and how she likes it and she invites or arrange for him to see her having sex then have sex with him also

including family stories

looking for long stories not short


I have few example
https://www.literotica.com/s/moms-the-best

https://www.literotica.com/s/his-mothers-diary

https://www.literotica.com/s/mom-went-to-work