In Vivian's two nude scenes, her breasts are obviously (different) body doubles. The breasts of the doubles differ greatly from each other, in terms of size and shape. Also, her face is never shown during these scenes.
In the scene in the laundry room when Viv meets the girl with the nose job, she is taking the laundry out of the dryer. When we see her take the second item out of the dryer you can clearly see that the dryer still has items in it. But in the next shot she kicks the dryer door shut and picks up the laundry basket to leave.