I don't know how I lost this fic, but I'm desperate to find it.

Girl!Dean has practically been raising Sam herself when John separates Dean and Sam. He sends Sam off to Bobby's while Dean goes with John to meet someone. That someone is Castiel. I think Cas was an angel in this. John needs a favor and gives up Dean. John doesn't think much of it since he's been 'offering' Dean up to other hunters for favors. Fem!Dean is a virgin and ends up becoming Castiel's mate. She even builds a nest and gives birth.

Castiel loves Dean and is more than happy to avenge his girl. He runs around killing (and castrating?) the men that abused Dean. I think Gabriel takes care of her while Cas's gone? Bobby and Sam find out what John had been forcing Dean to do and kick him out. I'm pretty sure John was killed too, but Sam and Dean were happy at the end.

Thank you so much!