How to translate まさか with this context- disbelief or surprise?


For some background: MC asked his girlfriend questions about wedding
arrangements without specifying who the wedding is for (he's arranging his
cousin's). Later, MC realises his girlfriend thought the wedding talk was
about them the whole time:

彼女はもしかするとー

「なあ、おい。。。まさか」

I know that まさか is usually used to indicate disbelief, but I'm a bit torn as
to whether here まさか would mean 'It probably wasn't that, right.' (disbelief,
unsure that's what she thought) or 'To think that you had thought that.'
(surprise, but realising that's what she thought).

I'm leaning towards disbelief, but I feel like that conflicts with his thought
process all 'it's possible she could have thought--'

A second opinion would be much appreciated.




From my experience living in Japan for 19+ years, I would translate this more
as _disbelief_ : "wait, you couldn't have thought that...".

Also, have a look at various translations on alc.co.jp, if you haven't
already:
[http://eow.alc.co.jp/search?q=%E3%81%BE%E3%81%95%E3%81%8B&ref=sa](http://eow.alc.co.jp/search?q=%E3%81%BE%E3%81%95%E3%81%8B&ref=sa).
You'll notice they tend to align more with _disbelief_ than _surprise_




From my experience living in Japan for 19+ years, I would translate this more
as _disbelief_ : "wait, you couldn't have thought that...".

Also, have a look at various translations on alc.co.jp, if you haven't
already:
[http://eow.alc.co.jp/search?q=%E3%81%BE%E3%81%95%E3%81%8B&ref=sa](http://eow.alc.co.jp/search?q=%E3%81%BE%E3%81%95%E3%81%8B&ref=sa).
You'll notice they tend to align more with _disbelief_ than _surprise_

