If you can find a 'safe' spot, meet him on his lunch break for a quickie or some oral. I'm sure that would make his day!

Get the car washed; use one of the drive-throughs and masturbate during -- but naturally, don't cum until you get home and have permission. Best if you wear a jacket...and nothing else.

Depending on how concealed your back yard is, gardening in some state of undress is an option.

Collect equipment and drive your hubby to the wilderness; enjoy camping and bondage.