Treat hubby to a virtual vacation at the beach on date night.  Get the kids out of the house before he comes home.  (Swap favors with a friend, etc.)  A couple of hours before he comes home turn the thermostat up until the house is about 80.  Download a video of beach scenes like this one onto a CD and set it to repeat until you stop it.  Pack a picnic lunch for your dinner.  Spread a big beach towel on the floor in front of the tv.  Put on your swimsuit and greet hubby at the door and tell him that you are taking a short beach vacation tonight.  Proceed as though you were actually on the beach and have the beach to yourself.