Is your girlfriend in highschool or something? This is one weak sauce topic. Here's how you should write it
Intro:
Some mariam-webster bullshit, distinction between law and morality, normative force, is and ought, all that jazz that no one in ethics really cares about
Para 1:
Utilitarianism alone doesn't provide a framework for justice
Under extreme circumstances utilitarianism could condone genocide if a sufficient large group of people would be made sufficiently happy by it
Benthamite utilitarianism requires that we choose the life of a satisfied immortal pig over any mortal human life because the pleasures of pigs are of an essentially same kind as the pleasures of humans
Mill's utilitarianism would require us to choose any amount of human suffering over any amount of pleasure available to lower animals
Para 2:
Relativism doesn't suffer from utilitarianism's intolerance
uhh, some people kinda like relativism sometimes I guess?
If we adopt some wonky meta-ethical framework it possibly isn't internally inconsistent?
All those points are lies, but they'll make a philosophy teacher happy.