Your 3 year old when they say someone has bitten them ?

Not sure what to think. Kimberley went to kindy at lunch time and came home with a mark on her face which i thought it was just a little bit of paint. She's just had her bath and the mark is still there on her face. This is how everything went after that.

Me: what did you do to it?
Kimberley: Boy did it
Me: which boy?
Kimberley: Spiderman boy did it.
Me: What did he do?
Kimberley: He bite my cheek.
Me: Did the teacher see and tell him off?
Kimberley: Yes

We went through this a couple of times and i got the same reply. If this did happen and it was seen by a teacher i would at least thought they could have told me unless she is making it up.
I just don't know what to think.