To be on the safe side they always say to expect the baby to be in hospital until what would have been the due date.
If he does well etc, then he will be out earlier, which then comes as a nice surprise.
Do not underestimate how tiring and stressful it will be, the first few days or so are bad and then when you are discharged and the baby is still in hospital.
How far from the hospital does she live?
Good luck to all!