I am back from work and I have read the update, not watched the epi yet.
I don't understand what is Yuvaans problem with Krishna being in love with Sayyam. He was the one who ditched her for baby and wasn't bothered that she was forced to marry 'rakshas' Sayyam. He wasn't bothered when Krishna begged him to stop her wedding to Sayyam. In fact he hasn't shown any interest in Krishnas happiness or her marriage. Yet suddenly now that he isn't happy with his wife he is bothered about Krishna? What is so wrong if she has started to fall in love with her husband? He does not own Krishna. Yes, a while ago Krishna was 'in love' with Yuvaan but that changed once she realised he actually didn't care about her.
He is jealous of Sayyam, his brother. That is the only reason I can think of why he would object to Kriyams relationship. I don't think he loves Krishna, he just doesn't like the thought that Krishna who once used to 'love' him now loves Sayyam who he doesn't like. It's obvious he is furious once he hears Krishnas confession and he is going to use baby to seperate Kriyam. I just hope this just makes Kriyam stronger and pushes them closer together. I hope that eventually after trying to split Kriyam that he realises it's never going to happen and that Kriyam love each other and belong with each other. I would like to see him support their relationship as if he is her so called best friend then surely her happiness is what matters. Krishnas happiness lies with Sayyam, he is her soulmate.