I have had numerous dck's in cloth diapers as well as my own daughter using them and I have almost never had this happen! What kind of cloth diapers is she using? I did have an issue with the diaper service diapers that one client was using...they tended to leak and I had to change the child's pants. But all other cloth diaper wearers I have had no issue with at all. Have you talked to the parents? Maybe they can provide a nighttime cloth diaper for naptime? Usually at night you use something thicker and more absorbent...although some people use disposables at night.