When I was admitted, a patient beside me had her family member came after visiting hours. However, he didn’t stayed long. I think it’s ok to stay a little longer but if the ward is a shared room with other patients, have to be more considerate to other patients who needs rest too :)
once i saw it's a friend (different) that stay over night and they are so noisy. till i have to inform the staff. 1 accompany parent if child is too young