The current study was designed to alter experimentally mothers' style when discussing sexuality and AIDS with their adolescent children. Mothers of 11‐ to 15‐year‐olds (N= 50) were assigned to an intervention or control group, resulting in 20 dyads in each group. All dyads were assessed twice, on self‐reported and observed communication, AIDS knowledge, and perceived vulnerability to AIDS. Intervention group mothers received two training sessions. Observational data revealed that intervention group mothers reduced their amount of speaking, asked more open‐ended questions, acted less judgmental, and discussed dating and sexuality more than did control group mothers. Intervention group adolescents reported increased discussions of birth control and increased daily comfort talking to their mothers. There was some evidence that intervention group girls increased in AIDS knowledge. There was no change in AIDS‐related beliefs.