g- (upper panel) and r-band (lower panel) light curves of the delayed SNe Ia-CSM PTF11kx (light blue), SN 2020eyj (dark blue), and SN 2020aeuh (black). The comparison light curves are corrected for the host-galaxy extinction inferred with SNooPy. The modelled light curves are overplotted. All three SNe evolve in a similar way up until ∼25 days after peak brightness, after which the light curves diverge, in particular in the g band. SN 2020aeuh shows a much more conspicuous late-time CSM interacting light curve that even increases in luminosity.