(request) looking for this really hot incest story I read probably 5-7 years ago. father asks his son to impregnate his own mom so they can have another kid. dad was shooting blanks. son and mom slowly start to fall for each other and eventually leave the dad.

I believe it took place in New York maybe in the 60s or something? It was super well written and I used to bust king kong nuts to it years ago. the sex starts off as purely pro-creative and with the lights off and no foreplay but starts to transition to lust between the mom and son as primal urges start to take over. any and all help much appreciated!

Source: reddit.com/r/eroticliterature/comments/glvdaa/request_looking_for_this_really_hot_incest_story