First of all, there is love, but it is not deep unconditional love. Definitely not on Anna's side. He loves her company, respects her, is maybe even attached to her...but love, I do not know. Subhlaxmi is devoted to her husband, feels she is the reason for his success and survival. She is smart. But she is like Kala in a very slight way--I think she exercises great control over Anna and revels in that position of power. Love, I do not know.
I think Subhlaxmi will be surprised today when Dutta finally does come for Naku. Why? Because Anna would never come for her. When Anna said "I love you, Subhlaxmi", it was conditional. She had helped Anna impair his greatest enemy Dutta and kidnap Naku. And Subhlaxmi understands this--the limits of Anna's love. When Naku talked of dying so Dutta does not suffer, Subhlaxmi probably realized she would never do that for Anna. The limits of her love.
I think these things are apparent to Subhlaxmi now. Naku is different than her. She is willing to die for Dutta. I do not know what motives Subhlaxmi has, if any, but I think her interaction with Naku and familiarity with Dutta/Naku's relationship will change her perception of her husband and her relationship with him.
What say you?