Portia’s CPR? (Mixed Up)

I was rereading Mixed Up (because I am Not Normal about it) and there was a part of it that I was confused about. When Reef is in the hospital, one of the doctors said that Portia did CPR on both Reef and Theo. How did she do that? Doing CPR properly on two people is basically impossible because you have to focus on the person you’re doing it on. I headcannon that either Declan was able to do it well enough on Reef after watching Portia do it on Theo, or that Ms. Latimore did CPR with Portia (the latter is more likely but the former is much funnier), but idk.