The segments in which he's standing up for Anika against Stinky TinKy(by Manonidz)š”š shows that Shivaay has started to feel responsible for Anika, he's too egoistic to confess his own feelings and still very flawed but this is a welcome change that he believes her and is even ready to go against TinKy, just compare the past and present how he disbelieved Anika for Tia and now he's not ready to listen a word against Anika and firmly believes that Anika cannot hurt anyone, he feels that he got married to her and now it's his duty to protect her, It's recently he shouted on her how she can take this marriage seriously but now when Pinky is about to throw anika out of OM, shivaay is there for her taking the marriage very seriously.
It has been shown subtly and beautifully that how Anika is effecting him and he cannot live without her and believes her truly.
Mallu