Do you find that as your children and grandchildren turn certain ages that it triggers you?

When my youngest daughter turned 8 this year, I finally figured out that simply the age of my children could trigger me. I have 2 daughters and a son...and I have found that my daughters trigger me in different ways than my son.

My oldest daughter is 16, my son is 11, and my youngest daughter is 8. My 16 year old is technically my step-daughter, but I am in the process of adopting her. She has lived with us full-time for 4 years and her bio mother passed away 3 years ago. Since we have such a good mother-daughter relationship, we only use "step" on occasion. I only bring it up in this forum because some of my triggers are related to blended family dynamics.