We don’t have much details on Uncharted 3: Drake’s Deception storyline, but it appears that Drake and Elena have gotten married after the events of Uncharted 2: Drake’s deception.
At the end of Uncharted 2, Elena almost died but was rushed back to the little village she’d resided in when Drake left after Chloe, and there she was revived. Chloe and Drake then had a short conversation which ended in Chloe telling him to go after the one he loves….Elena. Dirty ole Sully then made his move on Chloe. So the two kissed at the end, concreting what was once just feelings – they became lovers!
But here’s the evidence. In the image immediately below, you’ll see Elena wearing a wedding band on her left married finger. Who else could she be married to? And I’m sure Naughty Dog didn’t put something so telling in there for show.
Don’t go thinking up weird though, as this might just be an engagement.