看见岳父只能叫叔叔看见婆婆只能叫阿姨
[kàn jiàn yuè fù zhĭ néng jiào shū shū kàn jiàn pó pó zhĭ néng jiào ā yí]
'When I see my father-in-law, I can only call him Uncle; When I see my mother-in-law, I can only call her Aunt.' Refers to awkward family relationship situations or lack of true familial acceptance, possibly showing distance between oneself and partner's family.