The fact that she was being stealthy while using it but then blowing a big cloud (if it was that big) and around children with parents who may not know what vaping is yet and possible ordor from juice wether it be good or bad. Will the vapor effect the children? Probably not but until we're sure shouldn't expose it to children so young ( obviously loads healthier then analogs but still could be some nicotine not absorbed and if they're using a high nic level Children might get alittle)