tavia's official website has been updated with her character background in the series. her character's 26 years old and eventually marries the wrong guy (who is rumoured to be Raymond?!) who's like a playboy that keeps abusing her. she plans to meet a better man and there comes bosco. then she's pregnant with bosco's baby so he wants to marry her. first bosco hires a private investigator to take pics of tav's hubby with a secret lover. so bosco uses this to force tav's hubby to divorce her... then bosco gets together with tav although most of his family members are against her....
there're some other stuff but i don't know who plays who (they state the character name but not the actor who plays it)...
source: here
ps: there is a possibility that Ray plays tav's hubby cause someone said he's a villain?!