spouses are mirror images of each other
Proverb meaning that spouses come to resemble each other in personality and behavior, like reflections in a mirror.
As the saying goes, spouses are mirror images of each other; after many years together, their ways of thinking become similar.
A Japanese proverb combining 夫婦 (married couple) and 合わせ鏡 (two mirrors facing each other), reflecting the idea that spouses reflect each other's traits.