While the aggressive woman might claim that she's been assaulted, there's nothing in your account which supports that statement.
It's possible that the police might consider a charge of 'dangerous driving' but, as I read your account of things, the situation fails to satisfy the tests which the Crown Prosecution Service apply when considering prosecution for this offence:
http://www.cps.gov.uk/legal/section9/chapter_b .html#13
However, if your daughter admits that she intended to give the impression that she was driving her car at the other woman, she lays herself open to a charge of 'threatening behaviour', under Section 4(1)(A) of the Public Order Act 1986:
http://www.cps.gov.uk/legal/section11/chapter_ a.html#09
Chris