Prologue

Kayla, Luke and Ellie are not a normal family they are Hydra's deadliest assassins and have been for as long as they can remember.
Follow through their escape from Hydra and how their strong bond keeps them safe together.
They're on the run when they later meet the Avengers but their history with Hydra still follows to haunt them.

(ps: this story doesn't really follow the mcu timeline for example pietro is still alive and he and wanda are 30. Tony adopted harley keener and peter parker and has morgan who is 12. i also use my my own character ships) sorry for any confusion :)