The Crystal Tokyo Timelines

(:sailor moon fanfiction, usagi and Seiya's child:)
do you ever wonder what would happen if Seiya and Usagi had a kid from a different dimension?
no?
that's fair.
Sako and Chibiusa were never to come into contact with each other.
And they didn't!
Except one thing. they did.
When the evil and dreaded forces of the dead moon circus return, Sako must go to the 30th century and seek safe haven, but instead of ending up in her own time period, she ends up in a timeline Parallel to her own! she meets Chibiusa, and her friends from a whole new timeline!
Will the timelines be able to both exist? Or will Usagi have to choose between her two children?
what will happen? who will Usagi choose? will the sailor guardians defeat the returning evil? And who will continue the Crystal Tokyo legacy?