Mother and Stepmother are two important persons that take the responsibility of nourishing you and guiding you in your childhood days. They are looked upon as different persons although their purpose is supposed to be the same.
One of the main differences between mother and stepmother is that mother is the one who gave you birth through the womb. Stepmother is not the mother who gave you birth, but on the other hand she is the one who takes the position of the real mother probably after the death of the biological mother or the separation from her due to broken marriage.
It is firmly believed that there are rights and boundaries for a stepmother that she is not likely to transgress at any juncture. A mother on the other hand is not bound by rights and boundaries. This is the main difference between mother and stepmother.
It is true that mother has the true love towards her sons and daughters. A stepmother is not expected to show the same love and affection to the sons and daughters of another woman. You would also find in many cases stepmother showing all care in the world to her ‘sons’ and ‘daughters’.
It is considered that being a stepmother is equal to accepting a big challenge. The challenge is that you have to instill confidence and affection in the hearts of the children to who you are acting as stepmother. On the other hand a biological mother is the automatic cause for the confidence and affection born in the hearts of her own children.
In short it can be said that a stepmother is a new wife of your father whereas a mother is the one who has given birth to you by natural means.