["Family Relations, EarlyView. ", "\nABSTRACT\n\nObjective\nThis study aimed to identify distinct developmental trajectories of marital conflicts involving parents/parents‐in‐law among Chinese newlyweds and to examine how these trajectories are associated with changes in marital satisfaction over time.\n\n\nBackground\nWithin Chinese culture, the family of origin plays a unique and central role. Chinese newlyweds often encounter marital conflicts involving their parents or parents‐in‐law.\n\n\nMethod\nA total of 310 Chinese newlyweds completed four waves of surveys on marital conflicts involving parents, parents‐in‐law, and marital satisfaction. The Dyadic Latent Class Growth Model was used to identify distinct developmental trajectories of marital conflict for husbands and wives.\n\n\nResults\nFor conflicts involving the father, mother, father‐in‐law, and mother‐in‐law, three distinct developmental trajectory classes emerged for each family member. Notably, from wives' perspectives, marital conflicts involving the mother‐in‐law demonstrated the greatest variability in developmental trajectories. Moreover, couples in adaptive trajectory groups exhibited relatively higher initial levels of marital satisfaction and a slower rate of decline over time. In contrast, steeper increases in marital conflicts involving one's own father or the mother‐in‐law were associated with more rapid declines in marital satisfaction.\n\n\nConclusion\nMarital conflict trajectories are shaped not only by the specific family member involved but also by the gendered roles and relational expectations of husbands and wives embedded within the broader sociocultural context.\n\n\nImplications\nInterventions targeting newlywed couples in Chinese cultural contexts should attend to the specific family member involved in conflict and the gendered expectations embedded in intergenerational relationships, particularly those involving mothers‐in‐law.\n\n"]