Women with Borderline Personality Disorder (BPD) are prone to have sexual relationship difficulties and dysfunctional attitudes toward sexuality. A sample of 34 heterosexual couples composed of women meeting BPD criteria was compared to a sample of dating or married women from the general population. A short form of the Sexual Activities and Attitudes Questionnaire (SAAQ) was used to measure six types of sexual attitudes. Women diagnosed with BPD did not differ from controls on the frequency of three types of sexual activities in the last year but their subjective sexual experiences differed: they showed stronger negative attitudes, felt sexually pressured by their partners, and expressed ambivalence toward sexuality. Regression analyses suggest that anxious attachment mediates the association between BPD and feeling pressured to engage in sex.