Introduction: It is unlikely that parents can have effective sexuality discussions with their adolescent if the adolescent is not responsive to their efforts. We evaluated young adolescents' intentions of being responsive to sexual communication with their mother and whether youths who were likely, ambivalent, or unlikely to be responsive differed on their characteristics, features of previous sexual communication, and features of the mother-adolescent relationship. Methods: Participants were 259 Canadian adolescents (12-14 years; 53% girls) who received and returned a survey by mail. They completed measures of responsiveness intentions, expected outcomes of sexual communication, extent of past sexual communication, the frequency with which mothers encouraged questions and provided information about sexuality topics, open communication, and mothers' provision of warmth, structure, and autonomy support. Results: We found that 37% of adolescents were likely to be responsive to sexual communication with their mother, 34% were ambivalent, and 29% were unlikely to be responsive. Youths' responsiveness intentions were general rather than topic-specific. A discriminant analysis showed that only features of previous sexual communication separated all three groups whereas specific mother-adolescent relationship features (open communication and structure) and one adolescent characteristic (expected outcomes) separated the unlikely group from the other groups. Conclusions: Young adolescents' intentions of being responsive to sexual communication from their mother are diverse yet general in nature. Mothers' engagement in sexual communication appears essential for youths' openness to these discussions. Enhancing specific mother-adolescent relationship features and youths' outcome expectations may shift adolescents who are resistant to sexuality discussions to being more sure.