Operation: Babysitting The Littlest Black Widow

Bob Reynolds couldn't remember the last time he thought someone was cute—years of addiction, suddenly given godlike power, and hallucinations burned that softness out of him. Or so he thought. Then a spell goes wrong, and lethal, razor‑witted Yelena Belova is suddenly five years old again: a curly‑haired, crayon‑obsessed tornado who doesn’t remember the Red Room, doesn’t remember her teammates… and won’t even look at Bob.

As they wait for Dr. Strange to reverse the spell, they're tasked with babysitting their leader, but Bob couldn't help but wonder why de-aged Yelena was avoiding him altogether.

Or: Bob finds out how young Yelena feels about him.

BOBLENA and (minor) Ava/Bucky content.