The position tlmt people take on moral issues, such as infidelity, can be infiuenced by abstract principles (e.g., religious ideals) but also by their mvn relational experience. Conservative religious orientation provides clear moral prescripts about sexual behavior, but zuliat liappens luhen there is perceived strain within one's actual, non-hypothetical relationship? The author tests a series of hypotheses about attitudes toiuards infidelity using a representative sample of American adults aged 57-85. The results indicate that although most older Americans oppose infidelity in general, distinct differences emerge when the infidelity scenario involves greater moral ambiguity. When dementia is involved, the relational context in which the respondent is embedded emerges as an important predictor variable. Interestingly, each religious groupeven born-again Protestants-are susceptible to this moral contingency effect. Results are discussed in relation to Vaisey's (2009) dual-process theory, in zvhich attitudes are shaped by rational and relational factors alike.