That's the result of just a minute of getting distracted from her. She found a green marker, took the cap away ::to which she's already expert at:: and painted her lips and tongue green.
Her left hand wasn't spared either. Funnier is that when she is caught red handed ::er, in this case green handed:: and heard you gasping, she gets so happy and proud you can't really get mad at her.
She's a big trouble.