In addition to the proteins (agglutinogens) existing on your red blood cells, other genes make proteins called agglutinins (a-GLOO-tin-ins) that circulate in your blood plasma. Agglutinins are responsible for ensuring that only the blood cells of your blood type exist in your body.
Older children and teens are unlikely to start calling a stepmom mom or mother partly because of their fear of disloyalty to their biological mom. It is vital for all parties involved -- biological parents and stepmom -- to support their child's choice of what to call the stepmom.
Step-parents may travel alone with their step-children. If you and your step-children will be taking a solo trip, whether out of state or out of the country, it is a good idea to have your spouse (and the other parent, if possible, though not necessary) sign a consent form authorizing you to travel with the child.