闺蜜夫不可附
[guī mì fū bù kĕ fù]
This translates to 'The Husband Who Must Not Be Followed (or Attached To)' and seems to express warning or wisdom shared between close friends ('闺蜜' referring to a very close female friend) about inappropriate relationships with someone else’s partner or warns of getting entangled in a toxic or unsuitable relationship.