Article continues below advertisementThe relationship between Kelly Clarkson's ex-husband, Brandon Blackstock, and her former assistant Brittney Marie Jones was revealed in Blackstock's obituary after his death on August 7.While Clarkson and her ex were separated at the time of their romance, Jones was married to Gypsy Nights musician Greg LaPoint when she first initiated a relationship with the talent manager.Article continues below advertisement'He Got Screwed Over'Source: @gooserocks11/InstagramA source claimed Greg LaPoint was 'screwed over' by his ex-wife's affair with Brandon Blackstock.