Nebill,
Don't feel bad. My wife "allows" me to keep my 2 bikes in a corner of the living room because we don't have a garage (just a carport). And the tool shed is too dirty and crowded with a lawnmower, leaf shreader, rakes, patio furniture, etc.

She puts up with my "habit" because she has seen the health benefits of cycling.

Don't worry about the air-conditioning either.
I had a hard time explaining to my "old" Raleigh that I was getting a new bike.
But things turned out for the best because I converted the Raleigh to my commuter bike and he/she gets ridden 3 days a week. If I can muster up the energy I'll be riding 5 days starting next week.
My new bike only gets ridden on the weekends and organized rides.

Who's getting all the attention now?