The old man, retired early, lived in an old three-room house with his daughter-in-law and grandson. Anyone who looked at him said he was a kind-hearted man, living a gentle life, dedicating his life to his family. But no one knew that, every night, behind that smooth wooden wall, there was a silent battle – between instinct and reason.

He could not sleep. The gentle fever of the daughter-in-law on the wooden wall was like a wild beast in the fire that was smoldering in his heart. Since the day his wife passed away, his daughter-in-law and granddaughter moved here to live. She was assured, gentle, not only taking care of her children but also taking care of her father-in-law like patting meat. But it was that warm, carefree affection that promised her husband confusion. He began to look at her with different eyes. And he was afraid… afraid that one day reason would no longer prevail.

The dark day came unexpectedly, with the most normal appearance.
“Dad, my grandchild’s school is organizing a two-day, one-night field trip for the students. I’ll sign him up for it, Dad,” the daughter-in-law said as she walked out of the room, holding the school’s application form.

The father-in-law nodded, his voice even: “Yes, let him go. Let him socialize with his friends.”
That night, there were only two people left in the house. After dinner, everyone went back to their rooms. The daughter-in-law Livestreamed to sell goods while taking advantage of the application form. The phone rang, it was the father-in-law’s voice groaning:

“You’re free? Leaning on the thin tiles, it hurts so much.”
“Yes, Dad, wait for me for 5 minutes.”
The daughter-in-law knocked on the door, and the father-in-law came in. She was snuggling up and massaging him like usual. But unlike last time, today there was no grandchild sitting next to him, the room was strangely quiet. The father-in-law ran every time his daughter-in-law’s hand entered. Then… He reached out and grabbed her hand. “Dad… Dad…” – he stuttered, breathing heavily, eyes red. The daughter-in-law stood still.

Her eyes were no longer bewildered. She slowly pulled her hand away, gently but firmly. “Dad, you don’t need to say anything… because the camera is recording everything.” The father-in-law was stunned. From the corner of the room, a small camera the size of a finger flashed red. The daughter-in-law took out her phone, opened a video recorded a few minutes ago – enough to prove everything. “I’ve suspected it for a long time. The looks, the way you looked, the times I hung the clothes out to dry and got messed up… I didn’t want to believe it, but now I can’t help but clarify.

” The father-in-law fell backwards, his face pale. His last words before collapsing were not an apology, but: “Are you… planning to report to the police…?” The daughter-in-law remained silent, looking at the man who had once been her spiritual support, now curled up like a criminal. She did not reply. She only sent the video to an email address titled: “To my son’s father – so that he will always remember the limits that should be in a family.”