Hot Office

I'm so frustrated with these skinny bitches at my work that are always cold but don't dress warm.  I feel like I have a heater attached to me and having to work in a small office with the thermostat cranked up to 74 degrees is just cruel and unusual punishment!  One girl wore open toed lace up boots in the other day and proceeded to run a space heater because she was cold.  So now I'm in a hot office with a space heater across from me because she can't dress appropriately for the season!  I'm so frustrated and upset.  I've joked about how it sucks to be 8 months pregnant and could they turn the heat down.  I hate to be difficult but I feel like they are being super insensitive and selfish.