This is why I can't sleep close to someone else. Too hot.
Same, not that I don't want it, though. I try to mitigate the effects by using thinner blankets (even going down to bedsheets only if I have to), pajamas to wick away sweat, using fans for convection cooling, and (as a last resort) lowering the setting on the thermostat for less heat/more A/C.
Otherwise, the girlfriend in question will suddenly throw the bed covers off and go, "OMG! It's so hot under here!"
I'm kinda used to it because I'm from hardy, hot climate people. Because of this, in cold snaps I actually need to use far fewer layers than other people, or else I'll soak my layers with sweat and wind up getting cold despite the number of layers I'm wearing.