worried

Hey everyone. So I have a sweet 11 month old girl who will be 1 on December 3rd. She was s my first child and we are very connected at the hip:) we love each other tons. I just found out I'm pregnant again! I'm so excited but also very worried. I want to make sure my 1 year old feels like she had enough 1 on 1 time with me and her dad. She will be around 20 months when the second is born. Any mama with two or more kids willing to give me advice? Were your first horns able to adapt well with sharing their parents and divided attention?