Raavi has a reason for being scared and turning her kid into a soft and non violent child . Violence has brought only misery and disaster to her life.
Shiva's aggressive nature and maar dhaad has brought him to his current state. Raavi's fear is justified. Once bitten twice shy.
If in future anyone or Shiva blames her for leaving the mad house, she can justify (though doesn't need to) saying she doesn't want Shiva or her child to land into same situation again.