I'm not here to bash on any possible spirituality or beliefs, nor am I here to diminish your grief. Moreover, even though I'm studying psychology, I have only really put the bear minimum effort into dream psychology and the works of Jung and Frued, as I'm more aligned and interested in the clinical aspects rather than the philosophical. That said, going off their perspectives, Frued would likely say that this is some unconscious desire to relieve you of any guilt you had for your son's death, by directing that guilt towards another person. Jung might argue that this person indirectly is you, as it's a manifestation of your guilt.
That said, again, my personal stance on dream psychology is that it's more based in theory than reality. Whether you accept dreams as truth, and not just a garbled mess of our brains interpretation of our experience and subconscious thoughts is ultimately up to you.