I am pulling my hair out over this. It's been going on for several days. We try to silently return her to bed but she just laughs and jumps up and down to be picked up as she thinks it's a game. She can keep going for hours. Only get her to sleep in the end by giving in and lying on her bed till she falls to sleep as we also have an 8 week old and it's agony staying up with her and then going straight into night feeds with the baby. She seems to love the baby so not sure it's jealousy that has prompted this behaviour. Have tried giving her more milk to calm her, singing, giving her back her baby monitor which has lights and music to try and relax her. It's just so stressful not having any rest in the evening and it's not even as though we can finally sleep once she eventually goes to sleep as we are up all night with on demand bf the baby. I say we as we live in a house where crying can be heard everywhere it's not like dh and I can take it in turns to get a good nights sleep in spare room or something as we all hear everything! Any advice????