Ever since I have told my 7 year old about having a sister she has been so excited she has just stopped sleeping, it’s been 3 months now with sleep finally happening at 10pm to wake up at 5am (before this she was sleeping 7.30pm-7am). She came in my bedroom early this morning and I told her she needed to go back to bed until 7am as she was tired. She said we will get up now or I will hurt baby!!! I was gob smacked as she has never shown violent/ manipulative behaviour before and can’t wait to be a big sister! I told her that I had not brought her up to say horrible things like that and she could leave my room. She walked out hysterically crying so I left her to come back in my room (took about 20 mins) she wouldn’t apologise for ages but then started crying hysterically again and said sorry she loves baby and can’t wait to be a big sister and of course she would never hurt baby. I gave her a talk about not saying things we don’t mean etc etc. Has anyone else experienced similar behaviour?