you can't do anything. that and the uncertainty. >> reporter: oksana and her children zlata, and stanislav, 4, are relatively safe in lviv. but as other cities across ukraine turn into front line, other families have a difficult choice to make. >> translator: if not for my son, i wouldn't be here. >> reporter: tatiana and her son fled from kyiv where his 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 your child? >> translator: most likely, yes. >> reporter: why? >> translator: because it's my home. my family and relatives are in kyiv. >> reporter: here in lviv, 10-year-old nikita is trying to adjust to life with war. do you worry about him? >> translator: yes. >> reporter: what do you worry?