My brother's (now ex-wife) had me go shopping with her before their wedding. (To this day I have no idea why)
She dragged me into some clothes shop and came out from the changing room asking if my brother would like (whatever she was wearing), I just shrugged and went "of course he will". What other answer could there be, I wasn't going to stand there for 2 hours looking at outfits.
Turns out he didn't like it, was furious she had asked me (was just some stupid dress, nothing fancy). Some shitty boutique place.
EDIT: missed this part. He went mental over it, which in turn made her mental at me
So I just thought 'meh' and told them to fuck off.