Ok, so can you try to lightly approach the issue? Let him keep the key with the understanding that it for emergency only, and you don't mind he has it if it's only used for that purpose. It may queitly be a sign of good faith?
Me 35/XW 33 S13 & S12 M: 10/17/98 OM & S: 07/08 D final 06/09/09 12/03/09 - 06/13/10 "Piercing" 06/13/10: Engaged to Re-marry 10/17/10 06/25/10: Expecting baby #3 2/14/11