Complacent Night Owl

Emma's done a lot of growing and changing these past few months (Well, obviously-- as a 16 month old, that's basically her only job: Grow. Change. Repeat.). And something that's been particularly strange, to me, has been her sleeping habits.

She was a consistently routine little sleeper FOREVER. Pretty much from the hospital onward, she slept 12 hours a night (with a feeding or two, of course, in the beginning)-- no more, no less. By 4-ish months, we were doing 7am - 7pm every single night, no problem. Teething kicked in and upset things for a little bit, but still, unless she was experiencing some extreme pain, it was 7pm - 7am. If we got her to bed a little late, she was still up at 7am, like clockwork.

But sometime in the past month or so, something's changed, I just can't figure out what it is. I put her to bed at 7pm, just like always. But she isn't falling asleep until 8pm, sometimes even 9pm! She doesn't cry or whine (most nights), but we can hear her playing in her crib. Sometimes we'll sneak a peak and she's just laying there, twiddling her thumbs or playing peek-a-boo alone. If she sees us, she'll freak out. But as long as she doesn't know we're watching, she's been content to just lay in her crib for hours at night, waiting, I guess, for sleep to come. She's sleeping in now, so I'm not complaing!

Just saying... it's kind of weird, isn't it? Does anybody's else's baby do this?