Here's how it's gonna go :
> Boruto and Sarada only see themselves as friends
> They meet Kawaki when they join the Jonin rank
>Sarada falls in love, has an unofficial relationship with him, Boruto gets jealous
> Kawaki turns out to be a rebel, throws a coup on Konoha
> As someone who idolizes Naruto, she's conflicted, traumatized at what happened and awakens Mangekyo
> Still has hope for Kawaki and wants to stop him from fighting Boruto same way Sakura wanted to stop Sasuke and Naruto to fight
> Kawaki proves her wrong by attempting to kill her, Boruto saves her, she's no longer in awe of a teenage rebel
> Combines her power with Boruto to beat all the rebels low diff
> Has children with Boruto, kids will be the next gen Otsutsuki and surpass their descendants because of their Kaguya-esque DNA