As Shoulder slide step in and take left hand to right shoulder, slide, change places, here it changes:

as you are exiting from your 180^o anti-clockwise turn, duck and continue turning (another 360^o anti-clockwise) until you are facing the lady again - during this the lady's right hand should remain on your shoulder until you have finished but if she is dancing the shoulder slide basic correctly this will not be an issue,

stand up facing her (with an "are you impressed or what" kind of expression if you so desire).

Just to recapitulate: you turn 1.5 times in total and end up facing the opposite direction to where you start, your lady turns 180^o clockwise and also ends up facing the other direction..