  FUor outbursts in young stellar objects (YSOs) are the most dramatic events
among episodic accretion phenomena. The origin of these bursts is not clear:
disk instabilities and/or disk perturbations by an external body being the most
viable hypotheses. Here, we report our VLT/SINFONI high angular resolution
AO-assisted observations of 2MASS J06593158-0405277, which is undergoing a
recently discovered FUor outburst. Our observations reveal the presence of an
extended disc-like structure around the FUor, a very low-mass companion (2MASS
J06593158-0405277B) at ~100 au in projection, and, possibly, a third closer
companion at ~11 au. These sources appear to be young, displaying accretion
signatures. Assuming the components are physically linked, 2MASS
J06593158-0405277 would then be one of the very few triple systems observed in
FUors.
