Lenny - I'm happy to give her the attention, she's not one that normally craves it, so it's kind of nice having her hold my hand as she's trying to go to sleep in our bed. It's the overtiredness in me that makes me have enough! I like what you said, makes sense.

OP - LOL, your poor niece! I reckon it'd be pretty funny listening to what our two would get up to in the wee hours.

Kazzo - Thanks for that. I'm open to all suggestions. She hasn't had a growth spurt for a little while, could be a possibility.

Kaz- I get you on the million theories. It's so hard! Right when you find something that works, BAM, it no longer works! And as far as the sleepover goes, the more the merrier!

Miss E - That makes sense too. DD's imagination has gone wild lately. She sometimes pretends to be a lion or a bear, but she laughs like mad. Maybe there's more to that.

It's so hard when I'm tired too. Then I just want a solution. But looking at all the responses, it could be each and every one of those things, or it could be something entirely different. It's always good to know that others are going through the same thing. Sorry that you are though!