Incest in a hot spring where my beloved mother was made to cum all night in a secluded, empty hot spring.

When I was young, I didn't have a father, and I lived alone with my mother all the time. Perhaps because of her growing up in such an environment, she has begun to love her beautiful and kind mother as a woman... With those feelings in mind, time passed, and one day, when I was able to find a job, my mother suddenly told me that I was remarried... "I want to live a second life after my son finds a job," so I invited my mother to a hot spring trip with her two children to celebrate her before marriage. To convey not "thank you" but "love for your beloved mother"...