YANBU
Your body, your choice. There are only two people who must be at this birth, and that's you and your baby. Everyone else must have your consent.
And yes, if you had a whole football team of DC and wanted to randomly include a child and exclude everyone else: YOUR choice.
And if you had an entire football team of DSC and wanted to randomly include a child and exclude everyone else: YOUR choice.
That there may be a potential fallout from those choices does not mean you lose the right to make them. It's still your choice and yours alone.
I'm a little astonished at the posters who don't seem to understand what bodily integrity or consent are. They are paramount and yes, it's all about you, ShinyGreenElephant. And no one else.
As for having DD11 there, again, your choice if you want to give her the option. It terrifies some children, others are fine. I would show her the Lamaze video, so she knows, but she might still be scared. As for DD2, I would be concerned that she might be frightened to hear you in pain, even in early labour, without being able to truly understand why. Unlike DD11. But it's still your choice.
Your DH is being an arsehole in this, but I don't think this is grounds for divorce (if he's not usually one, I mean). The run-up to the birth is always a worrying time, and even more so right now. Whatever his motivation, he got this wrong, and I hope he realises this sooner rather than later.
But even if he grovels at your feet, that's no reason to ignore your instincts. They're telling you what you need to give birth. And you're wise to listen to them.
I hope it all goes as wonderfully relaxed as last time 