This four-year longitudinal project will enroll a total of 425 women who spontaneously quit smoking during pregnancy. The recruitment will take place during the delivery hospital stay in two of the largest obstetric-gynecology hospitals in Cluj-Napoca, Romania. The investigators will design, pre-test (Objective 1), apply, and evaluate a postpartum smoking relapse preventive randomized intervention among the first 250 recruited women and their husbands (Objective 2): 125 couples in the intervention group and 125 couples in the control group, comparing the women's relapse rates at 6 months postpartum. The project will continue to enroll and follow-up 175 additional women for a total of 300 not subjected to the intervention (125+175) to assess the extent of postpartum smoking relapse and associated risk factors in a prospective cohort study (Objective 3).