Inclusion Criteria:  Having 18 years or more. Having a child aged up to 18 months old. Being female. Being Portuguese. Being a resident of Portugal. Internet access at home. Presence of parenting stress (PSS ≥ 41).  Exclusion Criteria:  Current diagnosis of serious mental health condition (e.g., schizophrenia, substance abuse, bipolar disorder, and personality disorder). Language difficulties that impede comprehension/reading-writing.  All participants will be informed that they will be randomized to one of the study groups and that will only be included if they give informed consent to participate in the study.