Put on a show for your lover. Strip and tie them to a chair. Perform a sultry strip tease and give them bedroom eyes. When the time is right, in a sexy, playful tone ask them if they’ve done bad things to mages. This should confuse them. Before they ask you what’re you referring to, roll your eyes to the back of your head and scream “YOU WILL NEVER TAKE ANOTHER MAGE AS YOU TOOK HIM” and allow Justice to manifest and kill your lover.