A power flows through your mind as you look down on this poor girl, a power of what she could do for you, for instance you could tell her to gather you many more meals which would make her much more worthwhile than her being your single meal, or she could please you in whatever way you find desirable.
Then the problems of a slave also cross your mind, for instance no slave rarely wants to be a slave, so she may try to eat you or have someone else eat you, or she could or she could be snatched up while doing your bidding...
Then you get an idea.