Just for the other perspective, we have stopped at one and are very happy with our decision so far. I personally don’t want to go through pregnancy and birth again and we needed IVF plus the treatment for my endometriosis prevents pregnancy but I recognise these factors are all particular to me and many have no issues getting and staying pregnant and enjoy pregnancy and birth.
Some more universal benefits are cost, it would be so much more with two. There are a lot of family of four discounts but even with that, it’s still usually more to pay for activities, holidays, snacks, meals out, gifts, and unless you use reusable, more nappies, wipes etc of course the big one is loss of wages on maternity then the cost of childcare and then helping with uni at the other end.
We get family help and it would be harder with two, I think it would be too big an ask really so one of us would probably have to cut our hours. We have a lovely, comfortable life at the moment and I think would be much more stretched with another child. Plus we can do age appropriate activities for DD without needing to drag a child who is too young along or drag her to activities for a younger child. Today someone brought a small baby into the cinema so that they could bring their older child and the baby cried a lot, it didn’t seem fair to do that.
Also I struggle as it is with the drudgework and the idea of even more dishes to wash, clothes to wash, towels to wash, sheets to change and wash etc etc fills me with dread.
Then there’s your time, it’s much easier with one to get both me time and couple time. DD sleeps through the night now (largely, often comes into our room/bed about 4am and goes back to sleep) so we get evenings to ourselves, plus not having to get up multiple times a night. When she naps that time is ours. We take turns for lie ins at the weekend and try and get a date night once a month. With a second I think our me time and couple time would shrink too much and it’s really needed for our marriage.
Stress is high enough as it is with two full time jobs and a toddler, adding a baby or needing to referee arguments and juggle taking children to multiple activities wouldn’t work for us.
Siblings can be a benefit or a detriment and there’s no way to know until you have another. Issues like bullying, favouritism, jealousy, being overshadowed etc can occur in childhood, and in adulthood IMO many relationships between siblings are fairly distant with partners and friends being the closer support group. That doesn’t mean some sibling relationships aren’t fantastic, it just means it’s not guaranteed and so shouldn’t be the basis for the decision.
Environmentally one child is obviously better, the biggest thing you can do to impact your environmental footprint is to have one less child.
I think it just comes down to, weighing all of this up, do you and your partner want another? If so then crack on, as it is your life.
If you do stick at one, you are armed with valuable knowledge of how it was for you as an only child and if there were downsides you can try to mitigate them.