Evolution of the star with a dusty envelope together with an instantaneous orientation of the bow shock (top panels). Top left: star mass M_⋆ = 2 M_⊙. The velocity of the wind from the centre is v_w = 500 km s^-1. Top right: same parameters as in the left panel except for v_w = 1000 km s^-1, showing the change of orientation of the bow shock. In both cases, the mass transfer peaks with a slight delay after the pericentre passage. Corresponding to the two panels in the top row, an offset is shown between the star position along its nominal orbit from the centre of mass of the cloud in the bottom panels. Different curves show the offset computed for all particles forming the cloud (black curve), a subset of particles in the cloud that survive the first passage through the pericentre (green curve), and a subset of those that also survive the second passage. Moments of pericentre passages are indicated by vertical lines. The separation of 1000 AU corresponds to ≃0.12 arcsec at the distance to Sgr A*. Bottom left: v_w = 500 km s^-1. Bottom right: v_w = 1000 km s^-1.