Only Hell and Heaven are forever. Purgatory is not forever. She saw the place where mortal sinners are forever. It is actual for our times when people on our Earth do not repent. Probably therefore Baxter said nothing about Purgatory.

yes, but the interviewer, Mr. Roth said the dead go to either of the two places, Heaven or Hell, and she said nothing. Why do you think she said nothing about Purgatory when he said either "heaven" or "hell"? If what she says happened, surely she would have been made known of the existence of purgatory also, even if she didn't go there.

She saw the people who died in the mortal sin - they are in the hell.