Yeah... 70 doesnt sound hot at all, we never have cooler than 70 in here, and when it is no warmer than that, she should be fine without water in the crate, I agree that it is not a great idea to put water in a crate, but if it is super hot, they may still need it. But you are nowhere near HOT hehe. I am also a "dogs have the run of the house" person. I have always been and knock on wood, have never really had any problems, when they are puppies and I have to leave them for several house I put the bed in laundry room or bathroom (mind you the other night was a perfect situation when I wish I had crated Galahad lol....) When it is only 70 I wouldnt think she is over heated, it may be that the other dog was nagging them and she was just very very tired when you got home.
Marit