The wife of one's father. Not the biological mom whom actually gave birth to the child but the one who sometimes...... not always though, provides half of the financial, emotional, and moral support for a child that is not from her loins. Such women will also provide a loving, disciplined, and stable structure for the step kids while the bio mom collects a tidy sum in child support(even for months when dad and stepmom have the child) sleeps with a plethora of different men (sometimes providing the stepchild with a new half sibling) and parties like a rock star.
I have to go spend the summer with my dad and stepmom. We can't go to Disney World though because my dad has no money cause my mom gets it all.
A woman who by her own choice loves and cares for her husbands child/children. A stepmother is the mother in her household. Gods gift to some children to make up for the loser mothers that gave birth to them.
1. The hottest cheerleader in your high school class that your rich old dad just married and moved into your house and you can't stop thinking about boinking.
2. The 30 something Thai bargirl your dad just married and brought home that gives you a raging hard-on. See MILF.