Driven by the growing integration of Artificial Intelligence (AI) into daily work, this study investigates the Human-Intelligent Personal Assistants (IPAs) coregulation of work-life practices. Guided by an interpretive case study of Microsoft Viva Insights (MVI), we focus on the participation and influence of IPAs in daily work-life practices. Our findings reveal three coregulatory roles adopted by IPAs— rationalist, normalist, and moralist—that influence personal productivity, social bonding and relationship management, self-care, and work-life boundary management practices. By diving deeper into the human-AI relationship from a coregulation perspective, we contribute to the emerging IS literature on the nature and role of AI in transforming how people work. Our research provides valuable insights for practitioners, developers, and scholars aiming to enhance AI design and management, and investigate AI's broader impact on human behaviours at work.