I think Natasha's face might be partly burnt. Remember when Kanya's parents were watching the news and this guy was interviewing a lady about Natasha she said she was scared or something like that when she saw Natasha's face. And when Kanya's parents went to see that man about Natasha all the people they showed had burn face.
I think maybe Kanya's causes a fire unintentionally and Natasha's face got burn. That's why Kanya's parents are scared that Natasha might cause harm to Kanya.
I might be wrong but that's seems more logical. What do you all think???
Sorry if this has been posted before.