i search an older story

Story by ratchetclank25

hello, i try to find a story but i can't remember the title anymore.

he is a boy who has a friend with breasts (and he thinks he is a boy but it is a futanari) and they learn to masturbate together and they have sex together in a wooden hut. then it seems to me that there is an elypse and they see each other again and the boy realizes that his futa friend has sex with all his family.

(sorry for my bad english)