America and England’s relationships are helped with… themselves going to the past to get through certain obstacles, and in turn, that created parallel universes. An instance of this happening and how it affects their relationship, knowing there’s another ‘them’ that help their relationship.

Bonus 1: There are some truly sad universes.
Bonus 2: A!Anon can put some AUs into the fic.
Bonus 3: There’s a bad consequences from this meddling of time in the future and they all meet each other to fix it.