https://www.dlsite.com/maniax/work/=/product_id/RJ01182481.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_371648/

Her son looks like a huge idiot, NTR deserves it.

Base +15

>Mayumi lives with her husband and son.
>One day, her classmate Yuuma comes to the house after witnessing her son shoplifting.
>Mayumi is confused when she hears the details, but in order to protect her son's future, she asks him not to tell anyone.
>Yuuma, who has been told not to tell anyone, demands that Mayumi, the classmate's mother, become his sex slave.
>Mayumi bows down to her son and declares that she will become Yuuma's slave...
>From then on, Yuuma comes to the house every day, and Mayumi is made to cum over and over again all over the house by Yuuma's huge dick, which is bigger than you'd expect from a high school student.
>As these days go on, her original goal of protecting her son gradually fades away...

Base +19