Article continues below advertisementBrooks Nader and her sisters - Mary Holland, Grace Ann and Sarah Jane - are taking their summer to a whole new level.On Sunday, August 10, Brooks hopped on Instagram to post a cheeky video from their glamorous European getaway. In the clip, two jet skis zip across crystal blue water, each carrying two of the sisters. At one point, one of them throws a hand in the air, soaking in the fun.Article continues below advertisement"4 naked Nader sisters in the Med, a spin off," the DWTS star joked in her caption, adding a crying-laughing emoji for good measure.