I accidentally became the main character's mother

Mu Jin found himself inside the novel which he hated the most. He became the main character's mother who was neglected by his husband, and died in the end leaving his son alone in the world.

He had only three motives of his life now.
1. Get pregnant with main character
2. Run away from his husband
3. Raise main character with love and care

But why is his husband so obsessed with him that he won't let anyone even talk to him.

Mu Jin's son - Old man, don't dare to come near my mother otherwise I will kick your ass. *growl*

male lead - Brat, get away from my wife, he is mine.

How did my son became obsessed with me. Someone save me from these devils. They will eat me alive someday.

*The cover did not belong to me*