Our 2.5yo DD used to be a great sleeper, in particular she had a great bedtime routine which involved stories then lights out, kiss on the cheek, and we would leave her alone to go to sleep no problem. Since DS arrived 6mths ago her sleeping has regressed in a few ways, the most noticeable issue is that when putting her to bed she now insists that we stay with her until she has fallen asleep. If we attempt to leave she goes bananas and gets so upset it takes ages to calm her down again. Not always an issue as most days she falls asleep quite quickly but sometimes (like today) it takes upwards of an hour....very frustrating. Have tried e.g., repeatedly taking her back to bed when she gets up to follow us out the room but as above it just hasn't worked, it has resulted in nights of her being up until 11pm or later.
Has anyone else had this? Any tips on how to get back to having her fall asleep independently?