VLT/NACO measurements with uncertainties in the offset positions of 2MASS0652-57 B relative to A, obtained on January 8, 2006 and August 21, 2010 (circle data points). The solid line gives the expected variation in the offset positions of B relative to A, if B is a background stationary object. The triangle data point gives the predicted position for a background object on August 21, 2010. Error bars take into account uncertainties on the initial offset position of B relative to A on January 8, 2006 and on the proper and parallactic motions of 2MASS0652-57 reported by Faherty et al. (2012, see Table 1).