Starts as standard Armjive, pull back left hand, pull back right hand, now it changes:

Pull back on left hand only take left hand to left hip as opposed to left shoulder,

pull back right hand again only lady turns 90^o clockwise, wrapping in to her own arm and throw right hand down, out to left side away from you under your held left hand (this is the prepare)

Pull on left hand and raise to turn lady 1.5 anti-clockwise to face