radha sister or servant

is radha vish 's sis or her servent. I mean whenever vish say something radha do it without any thought.
if vish ask her jump in water and radha do it without any thought. if vish ask her get pregnant for me radhs do it without any thought. radha doesnt have her own mind. did vish have remote to control radha. is radha a robot. she do it without any question. stupid isnt it. radha your pray kanha dont u have courage. u should ask kanha give me courage to speak up to vish.