Urgent help-mdf size increased huge in production

Hi,

  my mdf size is 125gb, but today i created one maintainance plan with rebuild index, suddenly mdf size increased to 210 gb, if i shrink its not shrink below 190gb.

 pls help i am running out of disk.

thanks

Thanks - SelvaKumarSubramaniam.Please MARK AS ANSWER, if my answer is useful to U.