In the scene where Vivian and Edward are taking a bath, it opens with someone's toe in the faucet. When they cut to both of them in the bathtub, the faucet is at the end where their heads are! Which makes it impossible for them to put their toes in the faucet.

Note: The reason for this is if you look when Vivian is taking a bath before Edward askes her to be at her beck and call, there are two faucets. One by her right head and one on the opposite corner, near her feet! This gives you the illusion about the above