Did people actually find files for this? Blech. To the best of my knowledge this is a fan rumor but I haven't been around much lately.
I don't recall where I read about it, but it being a rumor makes more sense. Even if it is silly banter, it would be really out of place in Dragon Age since, as far as I know, we've never heard anyone referred to in that manner before across three games.
I think the way the game does handle the idea of marriage in the Cullen romance is perfect--ambient dialogue in the Winter Palace indicates that it's on his radar, he explicitly says to the Inquisitor that he wants to stay with her after "all this" is over, and everything else is left to headcanon.
My current play is my second Cullen romance. Since I've got the whole ball thing down now I'll be able to better appreciate some of the finer details like that.
You'd think that after so many years of internet people would've learned it's full of BS. A breeding ground for liars.
Other than the use of "Mrs" being out of place in DA, it doesn't seem too outlandish. Also, people know they aren't going to see all of the content in a single play, so falling for this one doesn't seem that bad.