Joanna Fortune: My daughter says I don't love her in the same way as her sister

I wonder if your daughter might be lashing out in frustration rather than telling you that she feels overwhelmed and needs help and support
The transition from being the child of a parent to becoming the parent of a child is a significant and often unsettling experience. Moreover, becoming parents can (re)activate issues about how we experienced being parented, sometimes issues we weren’t conscious of beforehand, and bring those issues to the surface.