小三再美终是骚的香不了
[xiăo sān zài mĕi zhōng shì sāo de xiāng bù le]
'No Matter How Beautiful, a Mistress Can't Fragrance Truly'. Suggests that a mistress may look attractive or act in seductive ways, but ultimately can't compare with the pure and virtuous charm possessed only by legitimate spouses or partners in terms of social standards and morality values.