phone number is? >> translator: i'm afraid someone i don't know will call and tell me some bad news. >> it's sad. >> what's the hardest thing? >> translator: that it's indefinite. and you can't influence anything. you try to monitor the news but you can't do anything. that and the uncertainty. >> reporter: oksana and her children zlata, 7, and stanislav, 4, are relatively safe in lviv. but as other cities across ukraine turn into front lines, other families have a difficult choice to make. >> translator: if not for my son, i wouldn't be here. >> reporter: tatiana nikovaczi and her son nikita fled from their home in kyiv, where nikita's father is fighting. >> translator: for every mother the most important thing is to keep their child safe. >> reporter: so you would have stayed in kyiv if it weren't for