This paper deals with modeling decision analysis for ethical consensus formation between two conflicting decision makers. For this purpose we try to construct a group disutility function for two conflicting decision makers taking into account the property of utility independence and convex dependence between them. By using such a group disutility function we could model the mutual concessions of two conflicting decision makers taking into account ethical preference with each other, and hence we can expect fairer group decision making for realizing better social welfare.