I never had a bond with my mother. Certainly not with my sperm donor. As siblings we were so busy surviving that we never formed close bonds either. It was incredibly easy to walk away and never look back. My brother showed up out of no where about 4 years ago. It was brief and uncomfortable and we pretended for about a week after he got home that things were good. I really resented him hunting me down. And I probably showed. It got worse when he kept mentioning all the things mother would disapprove of. I was also a bit shocked because a family member told me in 94 my mother had died of a stroke. She's had several so it wasn't a big surprise.
How awful. My heart goes out to the young @Kittens Mom and your siblings. Your siblings would undoubtedly feel so much better if they could make the break that you did. Parents who are this cruel to their young children deserve to spend their last years alone. Actually, parents who are this cruel to their young children should have those kids taken away. It's easy for me to be an armchair expert, but I really hate to see kids mistreated. Much the way that mistreatment of animals affects me - they are young and innocent. (Not to say that young children are animals...) (I've got myself in a tangle here and am now going to slink off quietly)
It is the reason as I walked by that nasty mother yanking her little boy around I told her to knock it off and just kept going.