The only fics that I can think of that might fit this request are the following:
And the World Spins Madly On by quiddative Rating: PG | Wordcount: 3,400 Summary: Dean has a secret. He kind of wishes the marriage certificate in the glove compartment of the Impala is real. Link: http://deancas-xmas.livejournal.com/52817.html
Some Other Beginning's End by elfladyarwen Rating: PG-13 | Word Count: 3943 Summary: Dean starts to think that pairing up with Castiel as 'pretend life partners' for a case in a local gay community wasn't the smartest idea. Link: http://deancas-xmas.livejournal.com/60181.html
The Most Wonderful Time of the Year by bellacatbee Rating: NC-17 | Word Count: 8,152 Summary: Castiel doesn't have a date to the office Christmas party until his best friend Dean volunteers to accompany him. Everyone thinks they’re a couple, but they’re not. At least, not at first. Link: http://archiveofourown.org/works/584947
no subject
And the World Spins Madly On by quiddative
Rating: PG | Wordcount: 3,400
Summary: Dean has a secret. He kind of wishes the marriage certificate in the glove compartment of the Impala is real.
Link: http://deancas-xmas.livejournal.com/52817.html
Some Other Beginning's End by elfladyarwen
Rating: PG-13 | Word Count: 3943
Summary: Dean starts to think that pairing up with Castiel as 'pretend life partners' for a case in a local gay community wasn't the smartest idea.
Link: http://deancas-xmas.livejournal.com/60181.html
The Most Wonderful Time of the Year by bellacatbee
Rating: NC-17 | Word Count: 8,152
Summary: Castiel doesn't have a date to the office Christmas party until his best friend Dean volunteers to accompany him. Everyone thinks they’re a couple, but they’re not. At least, not at first.
Link: http://archiveofourown.org/works/584947