@ADHDmam I'm not trying to be offensive or argumentative with it at anyway, just saying, we grow up, as well as the kids, and surely that also reflects in your parenting? In myself, for starters, the energy levels I had as an 18 year old are down the drain as a 37 year old 😂. And whenever I meet a mum with a similar age difference to mine, the common theme that comes out is that energy is lower as you get older, but patience is a bit easier to come by in return. My eldest is quick to argue with me, and as a younger mum I was quick to react to it- in a way that is typical of a young adult. All well and good as my daughter was a child, but as a teen, things escalated quickly. I can see that pattern emerging again a little with my little one, but now, because I'm older, and because I've had chance to see what happens if I carry on parenting that way, I'm trying to shape my parenting differently this time. That's a positive of this situation, I can see how some things shape the children's personalities.
Of course personalities do have an affect on your relationship, but would any of your DH and his siblings reflect that one had a more sibling relationship with his parents than the others, the way the OP is asking? And would it have changed if one sibling was 16 years older, instead of a 3 year age gap?
This isn't me trying to be argumentative, just reflecting on the OP and what I read from it, and reflecting on my own experiences too. It's an interesting subject, and it's not too often that I meet mums who were similar ages to me at first. And even if you do, as the OP has found through this thread, people can be very judgemental with it, and dissecting your relationship with the child/ now adult isn't easy.
I was thinking earlier how my kids memories of me, as a person will be completely different. My eldest will see me as a more fun loving person I think, who went out with friends on nights out in little dresses and high shoes, who took them to pop concerts and knew all the words along with them, who had friends over to stay and did McDonald's runs, along with putting them to bed, making rubbish birthday cakes, going to the park, typical mum stuff. My youngest now wouldn't recognise that as mum (apart from the bed and park, obviously), but will have a completely different perception of me. I don't think that would be the case if I'd have had them with a 3 year age gap.
Anyway, all very interesting and thought provoking.