Responses
They probably danced after Leshia was engaged/married to her evil brother (why else would he ask her to look after Leshia). At that point, what else can Cedric say to Tia, his enemy's sister? If any word of his love for Leshia got to the emperor, then they'd both be in big trouble.
But that was in that timeline, this is a different timeline, and it looks like Cedric is starting to fall for Tia, so he'll probably not take an interest in Leshia.

i thought he said he thinks of leisha as real younger sister T.T all lies!! lol just kidding but he did said it when they danced in previous life at the flashback. but oh well