Parents who constantly indulge their children's whims may create unrealistic expectations.

indulge 是动词，意思是"纵容、迁就"，指过分满足某人的愿望或要求，即使这些愿望可能不合理或有害。这个词常带有负面含义，暗示过度宽容或缺乏必要的约束。