Thank you all so much for your comments and thoughts. Based on the evidence of my children already, it feels like it should be a great decision. It is so hard to think forward. I guess that whilst a child a 60 doesn't sound impossible, if I think to my parents it is the 70s which are really different. In an ideal world, I would want to have a good chance of parenting my kids at least to when they hopefully find a solid healthy long-term relationship. I know they would have each other, but for me, real independence didn't really come until I was emotionally secure (probably at about 34!!!!).
If my oldest has kids when I did I will be 70 when my grand kids are born (if she has them). I want to be a grandparent for her and for them.
I can imagine that the golden age of parenting is 4-12 (although I loved 0-4 too), and whilst I would love more of that, the idea of me wanting that and then as a result, potentially leaving a child in their 20's all alone in the world would be so wrong (only because I would have increased the risk of that happening). Having said that, it is true that could happen at any age. But with everything with an older pregnancy, the chances get bigger.
I really thought about having more when my kids were little, and my conclusion then was that if I could have had a big age gap I would have, but three under 5 or 7 I didn't want (at 40). I loved being pregnant but having two bad sleepers (4 years of waking every night generally more than once) was enough to say no more. At that point I thought that I would be too old in the future.
The fostering idea is an interesting one, but in thinking about it, it makes me think the pregnancy thing is a bad idea. I have friends who have adopted and it has been incredibly hard. Rewarding for both, but incredibly hard. One has done it as a stay at home mum, which wouldn't be an option. There have been so many additional difficulties, and whilst everyone dreams of a healthy neuro-typically child, that is clearly not always the reality. I wonder if I am wrong that the various genetic tests now possible can identify all possibilities. AS would not be identifiable.
Friends have also done the dog thing. One for exactly the kids are getting older reason. My kids are desperate for a dog, but my concern is that it would upset our wonderful cat (and I'd end up the primary poop-scooper).
It is so useful to know that the last chance saloon is a common feeling. I am going to admit something deeply shameful now, because it is the most rediculous, stupid and selfish reason to think about getting pregnant, but there is a small part of me that wants to still be able to have a healthy baby. I want to be able to have Dc1, Dc2 and Dc3 and live in that wonderful family of kids and fun for the next 20 years. Although I also want to stop working full time and spend more time with my kids now. Which is perhaps what I should think about first. I just worry that they will so soon be at the age where they don't want to hang out with me.
Is that the reality of teenage years? Maybe I am facing the double whammy of loosing baby years and loosing my babies with an incorrect idea of what those teenage years will be like. I want to spend so many more years hanging out with them, having fun, and being a family.
And honestly, is that not why people do have more kids when their first ones are a little older?
I think I need you all to tell me that I my kids won't simply hate me as teenagers, and we will be able to spend lots of fun times doing stuff together. And I perhaps do need a dog to adore 