The silent treatment can back fire on the narc when they have used it one too many times and push you too far, when you have finally had enough of being treated so badly that you leave. You use their deafening silence to learn about narcissism, get yourself together and decide to go. At least that is what happened to me; while he was busy ignoring me, I was using that time to work out what was happening and what I was going to do about it. It was the beginning of learning to live without him.
The day I returned home my life spiraled out of control so fast. My Mom was feeling sick so I brought her to the hospital. They kept her overnight for tests, and broke the news the next day that she had stage 4 stomach cancer, and given a month to live. She never came home from the hospital. I NEVER left her side, and I slept every night in a hard wooden chair next to her bed. But I refused to leave because she said she didn’t want to be alone. My siblings were struggling with flights home and finding baby sitters for kids. So I was with her every day and would go home to quickly shower twice a week when someone else took my spot.