Responses
Why people forget that this is a Korean series therefore, calling an older lover Hyung/Noona or Oppa/Unnie is very normal because it dictates their lover status to them.
It was ai translation, if you read the other chapter you'll see him calling his hubby hyung not big brother
If u wanna be his bride maybe stop calling him big brother
Who tf calls people big brother anyways????
Is this a translation error and he's actually calling him hyung? Would make me think he's less of idiot if thats the case