Sarah does jumping jacks in a few rounds, starting with more support and progressively undressing until she begins a round of jumps with boobs completely unsupported. Boobs progressively get visually more sore during video with undersides and sides of her boobs starting to get red by the end of the video.
Great clapping sounds, and decent alternating between slow motion and normal speed to capture all that jiggling flesh. Her cute jiggly belly getting pounded by her sagging boobs never gets boring. It's gotta be painful - she does a great job getting through it.
A few rounds from the sides and from behind as well.