Hi small help

Frendz hi

I am swetha I started to  watch this serial in voit since 2 days back  I dint understand why vadu maa want to kill Ragnar ? Did they revealed bcz May be I missed one or 2 episodes in voot yaar it’s like bing watching 

But pearl is doing good job and pragti too can some body tell me why she wants to kill him and why is she acting very nice with him?