Am loving the sidecar idea though not sure how that works in practice - don't they then roll all over the main bed when they start the night there and/or have their day sleep there?

Astrid - yes, I'd love to know what causes the hysterical reaction. She's always been the same. Wakes up from her day nap in a complete state too. Total opposite to her sister who always woke up with a smile making, "hey, come and get me" noises even when she was a newborn. I'm pretty grumpy when I wake up though so she probably takes after her mum