This is just a theory on why the brother put the curse. If you remeber our mc thinking about the time he met an injured fox I think that fox was the brother of mc's husband because the husband saw mc at the shrine and not as an injured fox so that's why I think the brother did it, he fell for our mc when he was helped. (I forgot the names already I'm sory (/TДT)/ )
THE FACT THAT HIS NAME IS DRAKE THIS SHIT DID NOT AGE WELL