As you arrived at her bedroom, Gracie explains that she was willing to pay you if you could turn into a shemale, and fuck her ruthlessly without thinking twice while you were on the bed naked with her, and enjoying it. Apparently Doug must've told Gracie about the shemale sex you did with him one night.
Growing a penis wasn't special, but every time you do it, you have the tendency to grow everything else, because the first time you did it is when Doug requested you to do it. Just then, as you see Gracie get on the bed, you watch her take off her shoes, socks, and pants, until only her panties, employee shirt, and bra were only things she had on which started to get you erect. Without warning, your panties dropped, and your penis bursted out as you both got on the bed that Gracie was in front of.