I've only read half the thread.
I actually like LLF, though I rarely see it. I find it interesting & moving. And coming from a family from hell, I always used to wish that I might suddenly find out that my family wasn't really my family, & that I had a real, better one out there somewhere.
Used to - until I accidentally stumbled across an anomaly in my mother's birth record & mentioned it to my brother who'd been doing genealogy. He told me what he knew & I got a copy of her birth certificate, which proved it: my mother's parents were not the couple I'd been told were my grandparents. At this point I should've been going, "Hallelujah!" & finding my LLF - except my real grandmother was someone else in the family & I disliked her intensely because she was just as bad as the rest of them: I'd had very little contact with her growing up, & what there had been was unpleasant. My real grandfather isn't named on the certificate & it's impossible to find out who he is.
All this had been deliberately kept secret from my brother & me, & when he was told (when he started the genealogy, to preempt his finding out via records), he was told not to tell me, & he hadn't until I found out for myself. What hurt & angered me most was that I'd gone through lots of medical stuff by then - I was in my 50's - & I kept giving family medical histories which, unbeknownst to me, were complete bullshit. Knowing the correct history might've had an impact on my treatment. Yep, that's how much they cared about me.
I felt so sorry for my mother, even though I was well into being NC & she'd died quite young. It explained a lot, & I've no idea when she found out about her history. Her own mother lived a few minutes walk away & I don't rememebr her ever being in our house. I find it hard to get my head round that situation, looking back at it.
My real grandmother went on to have other children, but I have no relationship with them & though I vaguely remember them as OK people, frankly I'm glad to have walked away from the family. It was just easier to give up on the lot of them.
I'm so glad you've found your brother & have a good relationship with him, OP. All the best.