This story has a great idea going. The whole wishes thing and multiple yet same protagonists. And since its in the original marvel, it seems more interesting than most.
But I do have some problem with It.
1st. The pace. yeah it's true it didn't happen instantly, but Natasha got too interested too fast. I mean she is a spy for goodness sake. She should have been skeptical for at least 30 chapters in my opinion.
2nd. I dont know if you just don't care, but when you are writing a story, you don't just change stuff out of nowhere. Once something is published, you stick with it. Even if it's trash.
okay I guess i can understand that driving yourself further down a black hole is bad, but at least cover your tracks. Rewrite of as if the chapter you want changed. Then put a note to the original readers that there was change. This way, the new readers will have a smooth experience.