haha, if I stared at my girlfriend like a dead cow all the time due to how extra-ordinarily un-expressionate I am, she just knows that that's how I am,, just the same as how I don't make a big deal of the fact that she doesn't often look me in the eye, as I know she's always found eye contact uncomfortable. You'd think people would get a decent grasp of each other's personalities before getting wed.
Everyone's born neurologically different, I can't say I believe in laying into anyone for being who they are even if it's not classified as a disorder, either way in your hypothetical bizzaro-world scenario the couple would benefit most from some marriage counselling first and foremost, not an aspie diagnosis and an excuse of "I'm emotionally dead because I'm aspie". never mind the fact that aspergers doesn't prevent you specifically from opening up like that, my girlfriend has a rather extreme form of it and emotionally opens up to me with ease, infact she's incredibly emotionally needy sometimes.
I don't think aspergers should be used as a crux to explain narrow symptoms, according to the diagnostic requirements a wide variety of symptoms need to be observed not just "coldness to one's spouse", This clearly isn't always the case in practice though, I know one boy who got diagnosed by a speech therapist simply due to the way he talks (a little flat).
My original point was just that anything that aids the diagnostic process can only be a good thing, obviously this scan is only useful in conjunction with other evidence but it'll help make things clearer than merely the opinions of a psychiatrist alone. A lot of people use the diagnosis as a excuse and I just don't think that's healthy when they're pretty much normal.