Lulu's breasts seen in mirror as she changes into a thin gown through which her body is half visible. As she's moving and dancing the gown is raised enough to reveal quick glimpses of front and rear.
Inga takes off her dress and bra. She (presumably) notices a man watching her outside the window and proceeds to take off her panties. She puts on a transparent nightgown. She lies down on bed, lifts gown and starts masturbating.