Just a little update:
I ended up with 17 fry in the fry/maternity tank, and apparently Little Mama spat one into the mbuna community tank that she was originally in, but once that baby got a little size on him, I moved him over to the fry tank as well. So, eighteen babies total...and SO cuuuuute....

Little Mama stayed in the fry tank for about a month with the babies, then I put her back into the mbuna tank. Within one week, she was holding again. Less than a week after that, I spotted another yellow lab holding. My mbuna tank is a baby factory....or a brothel, depending on how you want to look at it...lol. In the meantime, I finally found homes for all 18 babies this last weekend and drove all over Oklahoma re-homing them.
Then I went home to my empty fry tank

Then, my son came home from his dad's and saw the empty fry tank

He demanded to know what "mean ole mama" - meaning me, of course - did with HIS baby fishies! So I tried to explain, but it finally ended with him picking out new fish for the fry tank

Obviously, Little Mama and her little friend will be spitting the next batches into the community tank...there is no way I can keep finding homes for all of the babies, and no one wants to buy yellows in this area, as there seems to be a surplus of them. However, we bought George (our betta) a wife, so I guess we're gonna see how bettas make babies next!
Thank you so much to everyone who talked me through this one! You guys are the best!