She's asking if she's the "a**hole" in this situation, but if anything, this mom is #goals.
The woman, who is white, shared that her 15-year-old son, who is biracial, recently got his learner's permit and accidentally cut off a guy in a truck. It happens! Especially when you're first learning to drive.
She writes:
My husband and I have a 15 year old son, who is biracial; my husband is African American and I am white (this will be important later on in the story). My son just got his driver’s permit and has begun driving with me on a regular basis. The other day we were on the road, and he accidentally cut off a truck, making him have to break abruptly.
She says the encounter "wounded" her son and "sickened" her: