Alex sighs in relief to have the weight off her legs. Carrying a person around in her belly on top of everything else is hungry work. Her desk is a necessity just to get by in school. Even when her belly isn't full of prey to make sitting in a normal one physically possible, she wouldn't be able to use it anyway. Her breasts are just too big for her to use the standard writing surface. So she has one with it off to the side. Which also conveniently leaves the front open for things like her belly when she has prey in there or for her to get an erection when her milf teacher inevitably gets the shemale loli hard.