Okay this is an AU of last chapter, or Dean sees something else in the mirror as Sam leaves to distract the daughter and break the mirror.
Dedicated to Dan (Sup)
Have a great day everyone!
Fez.
Dean squints into the mirror, wondering what was so important about this useless hunk of metal and glass.
Sam and Castiel had vanished from the reflection, but as Dean looked into the space around his reflection he saw Cas walking towards him, a gentle smile on his face.
Dean was standing in a line of salt with the mirror, and various supernatural-killing items around him.
"Oh hey, Cas." Dean said, turning around. "I was just comi-" he frowned as he saw no Castiel behind him. He looked back at the mirror, frowning slightly as the reflection of the angel got closer, even closer than usual, and stood next to Dean.
Dean looked at the space next to him to check this was all going on within the mirror.
Reflection-Castiel slowly took Reflection-Dean's hand and slowly slid a gold ring on his hand.
Dean looked at the reflection, stepping closer as the scene played, looking into Reflection-Cas' eyes, even as the angel's adoring gaze was on the other Dean.
Reflection-Castiel slowly raised himself on tip-toes and gently kissed Reflection-Dean's cheek.