Reply to My older daughter is not nice to her much younger sibling (14 years apart). I...

When a second child comes along, the older child experiences displacement, both from their place in the family and in their identity (and identity is HUGE in the adolescent stage). Also, she may not know how to get what she wants from the youngster in positive ways. Making time for just her periodically is a must, so she knows she hasn’t been replaced. Also, think if there is another child her age that you both respect who has younger sibling(s) and encourage her to talk with them. There are benefits that come from being an older child (automatic hero status, opportunity to learn positive parenting skills from you, if that is something she wants in her future, etc.)