Child of a second marriage here.
And my experience is a bit different.
My Dads ex wife cheated on him (my half brother caught her and told my dad). They divorced and my dad spent years trying to maintain a relationship with his children. I had a relationship with my half siblings initially.
But the ex wife poisoned them with lies, saying my dad had moved on with a ‘white woman’, despite the fact it was years after they divorced my dad met my mom and they’d divorced due to her adultery.
My half brother always kept the relationship with us because he knew what his mom had done. But my 2 half sisters, distanced themselves after a while, brainwashed with their mothers crap. Eventually my oldest sister went NC with her mother when she finally realised what a cow she was. The other sister moved to London.
My Dad has always tried to have a relationship with his kids from his first marriage, but his ex spewed lies that caused problems. And it’s always angered me because I missed out on a relationship with my older siblings because of her.
My half brother has always been there and only over the last couple of years, my oldest half sister got back in touch with my dad’s side of the family and re-built relationships. And it’s nice to be able to rebuild a relationship with her (we’re very much alike!). My oldest sister doesn’t even speak to her two siblings because she doesn’t want her mother to know anything about her, she got treated so badly.
My dad isn’t perfect at all, but he’s always always tried to have a relationship with his other kids.
On the flip side, my DP watched his parents divorce when he was young (his dad was a violent bully), and his dad went on to have 2 kids with another woman later on.
His dad has always given his half brothers everything, but my DP and his older brother got nothing. Not even any love or care. Never even bothered with his first kids. He’s an absolute scumbag. My DP tried to foster a relationship with him but he treated him like shit. And his older brother has kept his kids away from their grandfather because he knows what a violent arsehole he is.
Not sure what my point is other than some men are arseholes and some are not.