Maybe it's Fate (birdflash fanfic)

"dad what's this about a league thing?" Jess asked holding Wally's phone

"um...." Wally said looking over at Dick for help "well...."

"Jessica it's better if we tell you sitting down..." Dick said sitting next to Wally

Jess sat down wearily looking at both of the parents "yeah?" she asked

"okay so you know the way we had to go into the young justice league, that's where we met" Dick said

"well you sort of have to go into the league too" Wally said

"I what!" Jess freaked

"and soon enough you'll be a hero!" Wally continued

"no, no, no, no, no, no, no!" Jess kept repeating getting up and running super speed to her room

"that went... well..." Wally said

"really Wally! Really?" Dick sighed...