Just discovered after 20 years of research - quite by accident- that my paternal grandmother murdered my grandfather whilst temporily insane. They had six young children who went into care as a result.
My parents split when I was young and mum didn't know much about dad's parents except he and his siblings were cared for by three sets adoptive parents.
His adoptive parents were at their wedding but it was all kept hushed.
Mum and dad died within a couple of years of each other and I was none the wiser. It's probable mum never knew as she said she'd never met dad's birth parents which was a bit strange.
I'm just so shook up about this, it was bad enough to find a great grand uncle was murdered in the 1820's and a 1st cousin murdered his young nephw in 1780.
This too close to home, thanks for reading, I feel a bit better for writing this down.