[He's had a lot of mocking here so she wouldn't be the first to call it a fishbowl - plus there's another, older Peter Parker who knows of Mysterio in their own world. Then it was pointed out to him that there are actual comic books - which he read - and he's now defensive over people calling him a villain and he has tried to keep up the ruse of being a hero here. Being from an earlier point in time, their world's Peter has no idea of the truth as yet. He got away with claiming he is indeed from an alternate universe.]

Back home, Peter mentioned the name Mysterio to me. I liked it. I adopted it. That's what I'm known as now, although it's not a secret that my real name is Quentin Beck.

As for Peter, he is very much here. Actually, there are two of him, but one is from another world due to all the multiverse glitches going on.

[It just confirms his story, luckily for him. He will even try to convince MJ of that.]