你是我的爱妃我是你的爱妃
[nĭ shì wŏ de ài fēi wŏ shì nĭ de ài fēi]
Playfully compares the closeness of lovers to emperors/empresses in historical dramas loving their royal concubines, indicating mutual affection and intimacy but with some level of self-deprecation or irony.