trying to remember the name of a play

I'm trying to remember the name of a play a read several years ago. I think it may have been in college in one of those play anthologies, but I'm not positive. The main character is a teenaged girl who finds a dying angel in a cave. She has sex with the angel and becomes pregnant. No one believes her when she tells them how she got pregnant, but nine months later she gives birth to a baby with wings.

Does anyone know what this play is??

BatBoy?

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Sounds like it's closest to Agnes of God. But not actually Agnes of God.