Percyslittlesister
When Dean and Castiel Winchester let their daughter Johanna go off to college with the promise that she would be safe (She was half-Angel, half-fucking-Winchester for Chuck's sake, who would be stupid enough to mess with her?) they were not expecting her to fall in love, let alone bond. How can they accept that their daughter is safe, especially after discovering her mate's lineage?
This is a universe where Kevin was turned into an Angel and Charlie was not killed.