Pull ups aren't necessary. If she's still peeing at night, and doesn't wake up to do it, just diaper your girls til their bladders mature enough that they don't wet at night. You aren't doing something wrong - you just can't train a child to stop wetting at night. It's not about waking up to pee, it's about not peeing at night anymore and there's nothing that you can do to make it happen. It happens in time, each child's bladder matures at its own pace and it's nothing to do with how you "train" them.