As a somewhat powerful princess, the heroine is surrounded by dangers and benefits. The male protagonist is her nephew, the cuckold son of her prince and brother.
Attributes of the male protagonist: scheming bitch. He has rolled around, been cute, been under the imperial city, has been angry, smashed the door, and imprisoned people in a small dark room. He first deceived the heroine's elder-like love, and finally, emmmmm, deceived the beauty into returning.
The male protagonist's mother is the Crown Princess and she wants to be the Queen. The male protagonist's biological father is the uncle of the country and has military power.
This article is also known as "The royal sister-in-law wants to kill me every day but I sleep with her son" and "Am I being killed by my parents-in-law today"