A.
Actually I would put the 7 year old to bed first. She is tired from the school day, so it should be easy, and then, let little sis go in. It may encourage her to be quiet too, as big sis has to get her sleep, but if she is anything like my kids, who share a room, the little one wont wake her up. But, the oldest cant take a nap to make up for a rough night, but your littler one can. My 5 yr old goes to bed at 7:45 or so, and 30 min later, the 8 year old does. That has helped with the no talking thing too. Plus, I get a few extra minutes alone with my oldest. Good luck ~A.~