2.5 yo DD3 has not really slept through the night since she was about 5 months. Her waking has followed a variety of patterns- never predictable- from waking several times before midnight, to middle of the night persecution (like last night), to being awake and raring to go from 4:30 onwards, to waking every hour throughout the night (that was the worst).
On nights like last night she will simply wake up at say 1am, and just not go back to sleep. She tries to get into bed with us and we take her back to her own, lie her down and tell her to go back to sleep. She will then move to asking for "big hugs", and when we say no, it's the middle of the night and you need to be asleep, she starts asking for stories instead.
Last night she eventually went and shacked up with her big sister and slept from 3am (having spent 1:20am to 3am coming backwards and forwards to our room) to 7:45 when I had to wake her up for nursery. She evidently needs the sleep but doesn't seem to know how to get back to sleep once she's been through a whole sleep cycle.
Advice please. Our older 3 were all sleeping through the night by 2 yo and I've a feeling we should be somehow more proactive with this.