Gluttony's calm and usually falsely gentle eyes hardened at the sight of Lust stealing a piece of his cake. A slender hand reached out to grab the other boy's wrist in a firm, vice-like grip. "What do you think you're doing?" He asked in a smooth, even tone. Although his voice is mild, and his face is set in what seemed to be a blank, expression-less state, his eyes were stormy and threatening. This had not been the first time, and in the back of his mind, Gluttony was fully aware that Lust was doing this simply to get a reaction -- any reaction, out of him. Rather than seducing, Lust seemed to enjoy himself more on going around and ruffling people's feathers just for fun. Gluttony often found himself wondering what made the guy the Sin of Lust. 

"... Well?" Gluttony pressed on, waiting for a reply. His grip remained firm as he maintained a steady gaze on the other male.