Cool thread I idea! I've had a LOT of twins and triplets in my latest save (I've disabled quaduplets, which I think is for the best honestly.) I don't know how to make those nifty parallel graphics things, so this is gonna be a bit messier, sorry.
First, we began with the very first pregnancy of this save, with twins, Calin and Catlin.
https://i.imgur.com/iAVGTSB.png
https://i.imgur.com/oYEVb5l.png
https://i.imgur.com/OKrJ1pu.png
Then Catlin had first triplets, Cally, Satine, and Lylin.
https://i.imgur.com/8Pg8Ehb.png
https://i.imgur.com/B9Nb59U.png
https://i.imgur.com/DOTPZTf.png
And then twins, Cat and Sal. I didn't get as many pics of them as things were rather hectic at the time, since by then Lylin had had twins of her own, Gwendolyn and Galin! Here's what I managed to scrape together.
https://i.imgur.com/v6bTRo1.png
https://i.imgur.com/H5Kh9og.png
https://i.imgur.com/OPqGD6U.png
I seem to have missed Gwen and Galin as kids completely, gosh darnit, but here they are as adults.
https://i.imgur.com/9o92ueY.png
https://i.imgur.com/B00xNwL.png
That's Gwen on top left with her wife Riley, and Galin with his girlfriend Mara.
Anyway, Cally had twins as well, two girls, Charlie and and Calamity. I could've sworn I took more pics, but I can't find them now (I swear, sometimes my screenshots just don't save, ffs).
https://i.imgur.com/ECOhXBE.png
https://i.imgur.com/Re9yPpr.png
And then Satine had TWO sets of triplets, one right after the other. I have almost no photos, I was trying not to die. I'll try and get a group shot of them all grown up and get back to you.
There's a few more in this line, but I think I'll wait till they're a bit more growed to share. And there's my other save that has a couple, but eh, maybe some other time.