One day your children will grow up and maybe they will have children of their own.
One day you will no longer be here, and the photos that exist of you will be all that remains.
The photos of you as a mother, the photos of you before you became a mother, the photos of you and your partner.
Stop waiting for the perfect moment, just get in the photo. Hire a photographer. Create the memories that one day, your children will sit around with their children or their grandchildren and reminisce about who you were and how special you made their lives.