ROE-281 My mother and I had sex trying to get her pregnant - After we found out she was a stranger, we got carried away and started impregnating her - Saki Oishi

Saki, a mother who secretly yearns for her son Kosuke, indulges in masturbation. Meanwhile, Kosuke is also harboring feelings forbidden to him by his mother, and is tormented by them. As they spend their days unable to confide in each other, one letter changes their relationship dramatically. Saki holds Kosuke, who is upset after learning that they were switched at birth, in her arms. Taking care of the emotions that they had been suppressing, the two of them replace the bond between mother and son and strongly connect to each other through insemination mating...