Congrats! It is exciting! Now the hard part begins.
Actually, there have been people who have experimented with how long you can leave the males together. It seems like they're okay together for a long time, but if you take a male out and try to put him back in just a minute later, he's a goner. But most people do separate them. I forget what the typical time recommendation is though.
And I'm sure Gloomy has thought all about arrangements for the babies (I hope, at least). You don't wind up with accidental broods like you do with guppies. This was deliberate. Lol, and people always say that there's a low demand for veiltails, but how many of us here have one (or three

)?.