You can lie to each other. It is stupid and childish, but won't get you into any additional trouble with the police. Don't lie to the police to get your girl friend in more trouble. That can get you in real trouble.
I can’t say (he said, she said scenario) if she did or didn’t threaten him with worse.
I will say that the charges in the original attack should have been filed to get them on record.
I know women who’ve been harassed by men (not even always anyone they dated) and such charges help in getting a restraining order should they become even more violent in action and threats.
The sex of the attacker and victim are not the point.
And yes, false reports carry a charge as well.
Yeah. She'll probably scratch his eyes out.