Hi L.,the only thing i can suggest is maybe giving her rewards for going to bed on time.I dont mean bribing.Get her a sticker chart.Take her to walmart and tell her"We are going to pick you out some special stickers and a good girl chart." Explain to her that everynight when she goes to sleep like a big girl mommy and daddy will give her a special sticker and when she fills her chart we can do something fun.Have her do it for 2weeks at a time and then work your way up to a month and at the end of each time period reward her with a little something whether it be a trip to Mcdonalds or a new small inexpensive toy or book.After a while she will be back on track and not expect rewards.Kind of ween each other.Though she just started acting like this,,it could be because its now just dawning on her shes has to share your attn with her and the new baby brother.Only a suggestion.I had to do that with my youngest because at one point we had temp custody of our nephew who was a yr older but needed more help and he begn acting out about a yr after my nephew had already been with us.Good luck and i hope i was some type of help,H.
A LITTLE ABOUT ME:
Im 32(33 on the 18th)work from home mom to 3 children ages,15,13 and 5.Married to an amzing man who unfortunately isnt home often,hes a trucker.