I'M just thinking, she says Dad is very defensive and maybe he is hiding something.
If it were my kid and it happened on his fathers time, I would definitely want to know what really happened.
I would want to see, accident, police, EMT, insurance or some kind of report.
Something serious happened on Dads time. Mom thinks there is more to the story. If it were me, I would want to know exactly what happened. She is the Mom, her CHILD has 50 stitches in her FACE. Permanent scarring.
If dad is being evasive because he did something wrong, I would want to know what he did wrong.
I am like that though, maybe others would blow it off. Mom has every right to know what happened to her daughters face, and why.