Movies with Suspenseful Mood

He deeply loves his family, works hard every day, and even sells blood to earn money. However, he unexpectedly discovers his wife behaving strangely recently. Is she cheating on him, or has their love already faded?

The woman had a crush on the president since she was young, but she didn't dare to approach him because of her fat body. When she grew up, her appearance changed a lot. As his assistant, she accidentally had a relationship with the president, but she was afraid that he would dislike her, so she didn't dare to reveal her identity. Unexpectedly, someone else took her identity and even wanted to kill her...?