y does rishi hate tanuja

I am watching this show from few days . This track is so interesting but didn't understand y does rishi hate tanuja n wat connection tanuja has with rishi family ? Anyone please help

Rishi hates sandy because he was the one that killed tanu- his wife... tanuja is sandy's daughter (so rishi thinks) hence the reason he hates her...

tanuja is reincarnation of tanu rishi's love nd late wife who was killed by tanuja's uncle. ...rishi didn't hate her initially bt his biji think she is like tanu and rishi don't want to accept it nd think she is trying to become tanu nd he didn't like it at all...he has seen her wid sandy(tanuja's uncle) so mu her dat she came to dem for any wrong intention nd thniks she want to trap nakul nd after der Money as I think