Lack of sleep

Marian is very difficult at night. She normally goes to bed between 10pm and 11pm, and wakes up between 7am and 8am. She will sleep around one hour for her nap. So she sleeps around on average 9 hours. To make matters worse, during the night she wakes up several times. I do envy the children who sleep from 7pm to 7am and a 2 hour nap. Marian has never been like that.