Beautiful Platies, you will probably get an interesting range of fry there. Good choice to have her in another small tank, I bred platies once (not meaning to - new to the hobby back then) but I had to have her in a small add-on tank. I can tell you that that was a mistake, she displayed very aggressive behaviour and kept knocking the tank off - which happened during birth. Luckily, I still had about 6 fry left. I'll be intruiged to see how your fry turn out! I had a female similar to yours, just with spots on the blue part. Male was a orange platy - I turned out having a orange fry with black spots! Be sure to keep us all posted after the birth with a fry journal - I think that plenty of users would love to share the experience.