But Then Again (Built Another World, #3) by silver9mm

But Then Again - silver9mm

3.5 stars. An alternate ending to 'Becoming Less Defined.' Dean, Sam, Jared and Jensen all end up in the same universe. Story full of angst and explicit omega in heat sex.

'Dean fit into the curve of Sam’s body like a pearl in a shell, something rough and beautiful that was as much part of Sam as his own muscles and memories.'

Source: http://archiveofourown.org/works/6741055?view_full_work=true