I can understand Madhu. I beleive she was not in love with Mukund. He proposed her and as per our norms in the society, unless we have somebody in mind, we go with the proposal that come to our family. She just went with the flow. she may have liked his company and enjoyed his friendship and if married they would have been a normal wedded couple living in harmony. BUT RK came to madhu's life like a tempest and made her his life partener. Unlike Muku, Madhu absolutely hated RK. She did not think of him as even a human being. But when she came close, she found a diamond beneath that rough exterior. The real human being that is hidden beneath that exterior amazed her. Inspite of them being at loggerheads, he came to her rescue many a times (unlike muku who did not stay with her in trouble). When he opened up, she could understand why he became what he is and so she no longer hated that person. Slowly she liked every aspect of him and his ways and fell in LOVE. So i don't doubt her love...RK is and will he her first and true love!