It's not illogical for Vansh to fall in love with ridhima. I mean ridhima posses every qualities of being a perfect wife. She is the perfect blend of modern plus traditional views mixed together in right proportion. But why ridhima suddenly fall for Vansh ? According to her views Vansh was going to kill her and she should have considered Vansh's care only gratitude and she is still unaware about what Vansh is? Actually Everytime Vansh was proved a bad man infront of her.It would have been logical if ridhu had unearthed Vansh's reality and then started respecting him and fall for him. But everything is seemed illogical absurd now for rudhima