here is an idea to teach so called "TAPPU" lesson as u wish to teach her....
LET her feel inferior to icha for now being choti bahu and icha gettting higher position in house... Veer will still hate her from bottom of his heart.... Tappu Realizes if icha marries vansh she will be all alone.... veer hates her and in family icha gets all prestige... she goes and tells vansh everything about veer and icha... vansh gets angry... insults and tortures icha .. veer realizes this... and saves icha... marries her... and tappu is left behind crying... Misses her sid baby... sid returns to expose taps plan to kill Icha... and Tappu is trapped... Icha saves tappu from being jail once again from police by not complaining... and Tappu suffers hatred from each and every family member.... happily ever after...