I’m one of three, so is dh, and we have three dc. My sister also has three, so it’s definitely the magic number in our family.
We’ve got ds17, ds15 and dd12. The boys are very close but used to veer between entertaining each other and taking chunks out of each other in the early years. I think I’ve been out of that phase long enough to look back on those years fondly now, but I do remember feeling outnumbered and harassed by moments!
The boys are protective of dd but don’t have much in common with her, and they also find her a bit mystifying as she’s just hit the hormonal and somewhat unreasonable stage, which they don’t understand. Her eldest brother adores her, our middle son would defend her to the hilt if anyone upset her but also enjoys winding her up and they will often clash. They all like each other though, and get along for the most part. I have friends with 2 dc + whose kids fight & argue 24/7 though, so having multiple children in no way guarantees that they’ll be ready made playmates!
Our house is still, and has always been noisy and a bit chaotic, which may be down to having 3dc, or it may just be that our three are noisy & chaotic. Dc’s friends like to hang out here, and I often feel like I’m running a soup kitchen as I feed hungry teenagers several times a week, but when I moan I’m doing it half arsed as I like that we’re the house that they all like coming to.
It’s also expensive as all three play sports that require subs, kit and lifts, bus passes for the older two are £70 a month each, lunch money is £60 per child, per month, ds1 is now having driving lessons, many bile phone contract of £30 x 3 phones every month etc etc
Don’t underestimate how much teenagers eat, our food bill is ridiculous, small children make feeding 3 seem relatively cheap & easy - this will change and you won’t believe how much you’ll spend on bread and cereal when they hit the permanently grazing stage!!
Then there’s the white trainers. You’ll pay for many, many pairs of white trainers with a tick on them. Ditto clothes. Teenagers aren’t easily fobbed off with M & S sale rail and Primark, it’s expensive keeping them in clothes and shoes, school uniforms and sports kit. Upside to this is that our 17 year old has a part time job, and has now realised the ‘I need to work x amount of hours to afford that CK tshirt’ equation, so he gets it now.
Essentially babies and toddlers make having 3 seem like a reasonable and relatively inexpensive idea, teenagers will make you realise you live the bones of them, but that you had no idea how much time, space and expense they incur.