DD 20mths has decided tonight that she wants to sleep in the big bed (no disturbance so far) Unfortunately it is the spare double bed. We are due to move her into that room anyway but need to make it her room as dd/ds2 due in March. Origionally planned to put her in a cot bed then remove sides so she didn't feel pushed out of the cot. What now, as needs a bed and storage/space?