Just don't tell the wife until the fry are in the tank. Then she won't be able to say anything! 
Of course, that still doesn't solve all your problems, as the 10 gallons still wouldn't be near enough space for the fry long term. They are going to need another permanent home. Have you looked into how you will deal with them when they get bigger? Do you have friends to give them to, or a LFS you can take them to? (This is the curse of livebearers!
)

Of course, that still doesn't solve all your problems, as the 10 gallons still wouldn't be near enough space for the fry long term. They are going to need another permanent home. Have you looked into how you will deal with them when they get bigger? Do you have friends to give them to, or a LFS you can take them to? (This is the curse of livebearers!
)
and petsmart won't take them at all. I've got an LFS near me that'll give you 50% what they're worth so I'll prolly get about 75¢ each for mine. I'll save probably 6-7 so I could make $15 on them. Not much but it's something 
And bought a marble lyre-tail instead. Much better looking IMO if you get the right one. Ive also got 2 regular marble females. My male always flares though. I Want him to breed with my girls they'd make beautiful baby's. One fm is white the other black and the male white and black. I hope yours turn out good. I can't wait til they grow up. See how they turned out
