<p>In this study, we test the predictive value of <em>Co-parenting</em> during childhood and the Mexican cultural value of <em>familism</em> over companionship and intimacy with mother and father –independently- reported by young adult child. To do so, a sample of 118 students - young adult children from nuclear families- in a public university of a Northwest state of Mexico were interviewed using close-ended questionnaires; after that we performed multivariate analyses (i.e. path analyses). The results show a sex difference favoring women who reported higher level of companionship and intimacy in their relations with mothers. Similarly, women reported higher values on co-parenting and familism. Also, there were direct, positive and statistically significant effects from co-parenting and familism over companionship and intimacy with the mother. Our findings show that only co-parenting during childhood predicts the experience of companionship and intimacy with the father children experience during early adulthood.</p><p> </p>