Son of Satan and Daughter of Mother Nature

This is an au idea I had for some reason. Note that there will be swearing and bullying in this story because they couldn't leave Rin the fuck alone.

Everyone now knows that Rin and Yukio's father is Satan, but their mother was hiding something. Their mother is Mother Nature, she had chosen to be born in Assiah. Father Fujimoto realized their mother's true identity when Rin would pass out in the forest near the little church after playing for only a few minutes with Yukio. As a result, the both of them were forbidden to play in the forest to hide it from both boys... But what happens when Yukio takes the exwires to show them Rin and his past, including letting Rin explore the forest?