To somebody’s face
Definition 1 of 1
Pro Tip 1/3Bravery Implication
Saying something to someone's face often implies courage and honesty, but can be confrontational. 
She had the bravery to tell her boss to his face that the project was going to fail.
Pro Tip 2/3Possible Offense
Using this phrase can hint at saying something unpleasant or something that could offend. 
He insulted her to her face, leaving her embarrassed in front of her friends.
Pro Tip 3/3Emphasis on Honesty
Doing it 'to somebody’s face' is seen as more genuine than saying it behind their back. 
She appreciated that he apologized to her face rather than sending a text.