Sound like 'sleep time resistance' to me ... so it has nothing to do with being tired and more to do with not wanting to 'miss' anything that might be going on in the house.

This website has lots of awesome resources on sleep and tips for promoting healthy sleep patterns with kids ... I like it because it is medical research people who are passionate about sleep and not written by people who have a bias to sell you something or profit from something ~ just people honestly passionate about the role of sleep and your health!

http://www.med.umich.edu/yourchild/topics/sleep.htm