I'm sorry I don't have a ton of advice. But I do have some advice, at least what works with me and I have seen work with others about the delusions or psychosis. When I am talking to someone (family, or bf) while having psychosis, the more they try to tell me is it not real the more agitated and confused I become. I have found it helpful if someone listens to me, hears what I am saying, acknowledges that it scary, distressful ect and then distracts me away from these thoughts or subject matter. Unless of coarse she is in danger.

It's just helpful to have someone talk you down from your delusions in a more indirect way then out right telling me it isn't real. Because although on some level I know it isn't real, it feels real.