One of the main thinks that makes me consider a second child is giving dd someone to share the burden when me and dh get old/pass away. Having lost my dad a couple of years ago just after I had dd I was so grateful to have my brother to share the burden with - we arranged the funeral and my brother takes on a lot of the work supporting my mum - taking her shopping, doing the odd bits of DIY etc. I'm very aware of how different my (or most likely her) life would be if I was an only child.
I'm sure that all of you who have an only child have considered this and I wondered how you feel about this/deal with this?
For me personally, this is one of the biggest drivers to having another but if I could have some comfort/reassurance that my dd wouldn't be left to deal on her own with the burden of her parents then I'd be a lot more confident in a decision to just have one.
Does that make any sense?