The ward where her baby is only has 6 parent rooms and can take up to 18 babies so parents are asked to leave and swap rooms a lot. It's very much like musical rooms when it's busy. She was probably asked to give up her room for the weekend by the ward staff. It's very normal on nicu for parents to be away from the baby and spend time with their other kids. Some parents can only visit once per day while others can spend hours there. You can't stay next to the cot 24/7 on that particular ward because there is no room for parents to sleep in the nurseries.