This qualitative study used a narrative approach to address the vulnerabilities and problems experienced by the children of sex workers in Iran. A purposive sample of women who were referred to drop-in centres were invited to take part in semi-structured interviews. An analysis of the data identified 8 main themes and 12 sub-themes, most of which related to risks and harm being perpetrated on the children of sex workers. The main risk to these children was the likelihood that they would escape from home and become sex workers themselves. Also identified as problematic was the risk of child labour, becoming members of offending groups and becoming a member of a brothel.