Why does he always insult her?

She respects everyone but he is too insulting towards her. I don't think he considers her as his wife at all. She is just a liability to him. Poor Imlie. Let Imlie get out from his toxic life. When she becomes something she can come back to meet his family to give her regards to them but must shun Aditya for his I'll treatment towards her. Even greeting Malini too is good because she never insulted her. Self respect is above everything.

I bet Imlie will develop a good bond with crackhead's children.