It had probably been brewing for years Hardy.
He had a difficult background given up, natural parents went on to have two children and stayed together, imprisoned from many respects from a young age with boarding school, a lot to live up to etc.
Everyone looks at the case of the greedy son but it's probably much deeper but it's all locked in one man's head either way
I might be wrong, but years back it was the son who inherited the estate and the daughter probably got shares from it? That was starting to change though, traditions like this were becoming outdated. Take, Bamber, he was being made to work for his share, Sheila was technically freeloading, this would start to eat into him, especially when the twins arrived and Mum and Dad was growing fond of them. Bamber, knew, if he started to drift from the farming life, he would lose his claim, whereas it didn’t matter with Sheila. I could say a lot and the similarities, but I don’t know who reads these forums and its close to what we’re discussing.
I don’t think he’d set his heart on farming life forever, and after the murders there never seemed to be any interest in the farming side, it was all about the good life, which I don’t blame him, but I think his true colours were starting to show.