avouer
Just fess up.
Avoue-le.
— Blue Is the Warmest Color (2013)
Fess up!
Avoue !
— Pixote (1980)
Fess up.
Nothing to fess up to.
Rien à avouer.
Fess up and tell us.
Avoue-le et dis-le-nous.
It's time to fess up.
Il est temps d’avouer.
Tell him I'll throw him in jail if he doesn't fess up.
Dis-lui que je le mettrai en prison s’il n’avoue pas.
— The Wailing (2016)
Are you ever going to fess up about cheating on your boyfriend?
Vas-tu un jour avouer que tu as trompé ton copain ?