Some coturnix hens just don't get along with anyone. Here are a few suggestions that you can try. No guarantees on any of them but the last one.
Put her in a different pen with a different male. She just may have taken a dislike to the first male.
Put her in a different pen by herself for a bit. She just may have wanted some alone time.
Put her in a different pen with something to beat up like a CD or a bundle of hay. She just may be cranky and need something to focus her anger on.
Put her in the freezer. It has been my experience that if a coturnix hen decides to beat up the male, she will beat up any other bird that gets in her way.
Good luck with it. He should be fine after awhile. He hath been officially hen pecked and it will take a bit to get over it.