Romeo's attitude towards tybalt after meeting juliet

When Tybalt comes to give Romeo a thrashing for disturbing the Capulet Party, Romeo attempts to convince Tybalt that they are now family and not enemies. Of course Tybalt is clueless about their union. I think there is an amount of sincerity in Romeo's voice. He truly wants peace with Tybalt now that they are related. Of course, Romeo's pleas just make Tybalt angrier.