One male will "claim her" as his (or thinks he has) and defend her, keeping the others away from her, but she may let the others breed her if her male isn't paying attention, lol.
If she breeds with the regular pearl male your babies will be pied pearl greys and regular pearl greys, (should be about 50/50) and maybe another color or 2 could pop up if they are both carrying any recessive genes.
With her pearl grey coloring being dominant over the other 2 light males' colors, most of the babies will be pied pearl greys like her, maybe a few regular pearls, maybe a few pieds and colors of the males... It really depends on what everybody is carrying in their genetic background (and which eggs actually hatch!), but yah, pearl grey is dominant so I'd expect most of the keets to be pied pearl greys like her or regular pearl greys.
If you can post pics of the 2 light males I might be able to tell you what they are, if you want to ID them.