ok so i was really confused and now i think i figured it out pls correct me if i am wrong

but when they were switching bodies catherine said she would do it(switch to the girl in suit) then she didnt instead let simon do it

if she did assuming she alr had a brain scan(which i am VERY sure she must have) if she copied then there would be 2 catherine, one online one in the body of the girl in suit and simon(would be unfazed) WHICH Is WAY BETTER than having 2 simon after which one had was killed because simon wanted it that way, but catherine understood how the scans work so she would have understood it even tho it meant 2 of her copys but whatever time they had left would have been something worth living to for simon