Cosleeping question-- personal experience please!?

Co-sleeping with a Toddler/Pre-schooler and a baby is more dangerous. You are aware of your babies presence but your older child has a higher likelihood of rolling over on the baby and possibly smothering them. I co-slept with both of my kids but my daughter moved to her own bed at 18 months and my son at the age of 2. It would not be cruel to move your daughter to another bed before the new baby's arrival. Don't make the transition about the baby, it should be about her being a big girl and ready for her own bed. To help our transition each time the kids got to pick out their bedding and my daughter got a new doll to sleep with and my son a lamp that has fish on it and lights up the room at night like he is undersea. It helped them to be excited about the move instead of upset.