I used to be able to tandem nurse the babies with my twin nursing pillow, but now they hate it so, I have to do one at a time. It's really FUN when they both wake up at the same time in the middle of the night. The last few nights, they both decided to wake up at 3am. Both of them. At the same. Damn. Time. Because we co-sleep, normally I'll just nurse whoever is awake, while lying down, and we can both fall back asleep pretty quickly while he/she eats. But when it's both of them, I can't use the pillow like I used to, so I try a few different methods and just use the one that makes them the least pissed off. Stacking them one on top of the other has worked in the past, but not anymore because they're getting so heavy that they smoosh each other, so my only other option (that I frantically attempt in the darkness) is to side-lie and nurse one, and then drape the other over the side of my body and just focus on making sure their noses aren't smooshed into my boobs, so they can at least breathe. Not the most comfortable of things in the world to do, but it works. Both babies fall asleep, and eventually, I can too! It's midnight Boobie gymnastics!