Have you kept a big secret?

Have you ever kept a huge secret from your BPD parent? I’m low contact so it was not too difficult, but I hid an entire cancer experience from her. I had an open hysterectomy with 8 week recovery, 6 weeks of radiation, and 4 months of chemo from her. I didn’t want to tell her because all her crazy would come out- she would make it all about her, wanting to visit, talk on the phone at me all the time, and then she’d be crying and upset a lot, praying for me, telling all her friends to get sympathy for having a daughter w cancer, and oh god, all the fights they would break out because I would be too cranky and sick to be sweet and nice to her, she has a hair-trigger for raging at me. So I just went extra LC for 6 months. And I didn’t lose that much of my hair because I cold-capped. I’ve been cancer free for almost three years now. She has no idea.