家有悍妻小三靠边站
[jiā yŏu hàn qī xiăo sān kào biān zhàn]
'Husband's Tyrant Wife Makes the Mistress Step Aside' - This username implies that one has a powerful or intimidating wife who would protect her marriage so strongly that there's no room for anyone else trying to interfere, such as another woman (a mistress). It reflects Chinese people's understanding of strong family loyalty in an ironic or joking way.