“Women are always complaining, they want to have their cake and eat it!”. Such is the comment of a female internet user, reacting to an article in a major French newspaper, Le Monde (October 29, 2010), in which some women gave firsthand accounts of sexism in the professional sphere. Such a reaction illustrates the hostility against women who report being victims of sexism. Complaining too much! Not determined enough! Such negative judgments made by women about other women who report discrimination are not a specifically French phenomenon. Indeed, reporting discrimination poses a problem in western societies in general. Women are blamed or negatively judged by their fellow ingroup members when they report or confront discrimination (e.g., Garcia, Horstman-Reser, Amo, Redersdorff, & Branscombe, 2005; Kaiser, Hagiwara, Malahy, & Wilkins, 2009; Marin & Guadagno, 1999). These negative judgments are a serious barrier to social change and the fight against discrimination. Research has demonstrated that women often failed to report or confront discrimination of which they are victims (Brinkman, Garcia, & Rickard, 2011; Hyers, 2007; Kaiser & Miller, 2004; Sechrist, Swim, & Stangor, 2004; Shelton & Stewart, 2004; Stangor, Swim, Van Allen, & Sechrist, 2002; Swim & Hyers, 1999; Woodzicka & LaFrance, 2001). And raising a disadvantaged group’s status is hindered by the failure to claim discrimination, as it maintains the status quo and contributes to legitimize a belief that discrimination, especially gender discrimination, is no longer a current problem. In this light, it is essential to improve our knowledge of the factors likely to favor reporting discrimination among women. Thus, the present research investigates how women may contribute or not to reporting the discrimination of another woman. Two experiments examine whether the role played by the commonality of fate with a female victim of sexism can help to understand inconsistent results in the literature, and more precisely, when and why women may show supportive or derogative reactions towards a discriminated peer. Indeed, in the domain of women’s contribution to claiming sexism, research reports some incoherent results. Women seem to adopt either behaviors with positive consequences (i.e., they constitute an important source of social support for the victim) or behaviors with negative consequences (i.e., they reject the victim) towards a female victim of discrimination. To better understand these incoherent results, we suggest that the female observers’ commonality of fate with a female victim of sexism will influence the extent to which they will report this sexist act (Research question 1) and their judgment of the victim who reports discrimination (Research question 2).