Hi guys, i'm looking for a multi chapter fic i read awhile ago where Sam, who is maybe 10-12 is bitter about Dean treating him like a kid, so i think he makes an accidental wish (Maybe to fae? or a leprechaun?) to be older. 

I remember that Dean and Sam woke up with their ages swapped, and then they continued to age in opposite directions by threes (Sam was 17 and Dean was 13, Sam was 20 and Dean was 10, etc...) and Sam began to fear that Dean would disappear. John comes back later and almost attacks grown up Sam. 

Also looking for another specific fic on Tumblr (I think) that is a Wincest 2 parter- younger Sam and Dean are together and older Sam and Dean end up in the past with them. Older Sam and Young Sam end up sleeping together and Old Dean and Young Dean do too. But for moral reasons I think Dean won't touch young sam? 

Also if you guys have any good recs about the opposite of De aging, like one of them is an adult or they time travel and meet child them, idk that's my hard to find niche fanfic obsession.