Stash House (2012)

(0:17) Briana Evigan strips down to her bra while making love with her boyfriend. Soon the bra comes off and we catch a brief glimpse of left side boob as he has picked her up and turns her around against the wall. Though we have seen her with a bare back now, once she is against the wall the bra has magically returned for the rest of the scene which includes her leaving the room and coming back in the bra when the guy discovers something in the room.