Is my client a hybrid Grey as seen by the psychic who referred him?

This is not the case. He is not a hybrid Grey. He, like many humans, has genetic alteration from being manipulated by them, but he is not a higher-level Grey hybrid. So you can give his mother some reassurance about this. This illustrates the complexity of doing psychic work in a definitive way. There are many energies and crosstalk among them and this creates many potential sources of confusion and misalignment of interpretation with the energetic signatures encountered. There are many ways to misinterpret alien involvement. Even something as simple as having a preoccupation with the subject can create the energy of the extraterrestrials in the thought plane of the client and this may be picked up by a psychic scanning them for information and this can lead to false conclusions about their origin or current activities. He is simply fighting a combination of negative karma and spirit manipulation, as is true of all humans, and he can continue to make gains now that this clearing has been done on his behalf.