This is clearly an alternate outcome to this comic, though I'm not sure what explanation could be given for it. They could only get a room with one bed? They flipped a coin to see who would share with Grace and it landed on edge? Grace went overboard with puppy-dog eyes?

I actually considered turning "how did they wind up in the same bed" as a survey question, but then I considered what some of the answers were likely to be, and... no. That's not gonna be a survey question. Susan's wrath would be never ending.