You just linked an article that says she's an evangelical who makes Catholics uncomfortable.
It was ongoing. There were pro-Morales protestors in the streets before he was told to step down. Order of events, people. Order of events.
How do you imagine that conversation would go. "He there! We're the military. We're gonna force out the president at gunpoint, and let you take over in his place. Unless you don't want us to, and then we just won't do it." I don't think that happened. I think if the police and military contact you to say they're overthrowing someone by force and installing you as president, you are basically at gunpoint yourself.
I don't think it is. I don't know discounting just Morales was reasonable, though I appreciate why they wanted him to step down. And I can see the logic following that decision to get someone from a different political party in charge of the transition. And with that perfectly reasonable explanation for how power might have fallen to Anez, and in the absence of any evidence that Anez made the decisions that put her there, it seems sort of ridiculous to just assume conspiracy. And also, the people most aggressively assuming she was in on a conspiracy are the communists here, who think the CIA is in the shadows every time a socialist loses power.
It doesn't matter if they had an idea, it matters if the idea was hers. Being picked by someone else to be the interim president is still very, very different than planning a coup to put yourself there.