"So happy my sister Gabi is in town!/Super feliz que a minha mana Gabi esta aqui comigo" the 32-year-old model wrote alongside the photo.
Gabi, 31, is one of Bundchen's four sisters. She was in New York City Wednesday to help her supermodel sister celebrate her new BLK DNM ad campaign, Us Weekly reported.
Senate Democrats to pull all-nighter on climate change
Dennis Rodman pledges to end trips to North Korea