Cannot get 3 year old in his own bed. My own fault. Mum guilt when new baby came along and he slept with me ever since. Now baby is in her own room and I'm stuck with a defiant threenager who will not stay in his bed. I've tried everything he just keeps coming downstairs. I try not to shout too much as don't want to wake the baby. I also refuse to sit with him for hours in his room as the evenings is the only peace(ish) I get all day! It's getting on for 9pm now and he's still hyper running around downstairs. What can I do?