Can she legally go behind my back as the executor of the will and sell the home?

I am the executor of my fathers will. In the will, it states everything needs to be sold and divided 6 ways. I’m in the process of trying to sell his motorhome, 2 cars, a truck, a tractor and a car trailer. Now I think the last thing I should sell is his home. Seeing if the home sells first, I have nowhere to put all this other stuff. My sister, who is upset that things aren't selling fast, went behind my back and called a gentleman to make an offer on the home. She said that if I don't take it, I can get in trouble for stealing from the estate.