In the sequence with the American, Suzanne's outfit changes from a one-shoulder black dress with white stripes trimming just the top of the bodice, to a one-shoulder black&white striped top with a black skirt, and back again.
At approximately the 9 minute mark, Luc and Suzanne are lying on the ground making out, with Luc to Suzanne's right. When Suzanne pushes him away and they both sit up, Luc is now on Suzanne's left.