Sway Flip-flop

Start with man’s right to lady’s right. Both take a step back, at the same time making a half loop movement with the right hand, to the right.
The man pulls the lady towards himself, using his right arm. As the lady moves forward, she turns anti-clockwise, 180°.The lady comes into the man's right side. The man places his right hand on the lady's right hip. You both then take a step back. The man offers his left hand in front of the lady at waist height, to support the lady's left hand.
The man nudges the lady forward (with his right arm) and across to his left side, keeping hold of both hands. The lady's left hand moves into a 'nelson' position behind her back. The lady looks to her right at the man. The man looks to his left at the lady.
The man then pulls the lady back into his right side. You then repeat the step above, the man nudging the lady forward and out to his left side. The man pulls the lady back into his right side again. To finish the move, the man nudges the lady forward with his right arm and releases his left hand. The lady rotates 180° clock-wise to face the man. The man may then return the lady, or continue into another move.

Diagram by "Neil the Eel"