You can try simply waiting by the tank. If you stand in front of her long enough, maybe she'll figure out you aren't a threat and spit them out. You could try feeding them then. It sounds a bit stupid, I know.
I did this with a pleco that would run if it saw me from across the room, now it actually tolerates me feeding it.
If your fry are anything like angelfish fry, without yolk sacs, I'd say you have 4 days max to get some food in them, and thats if you have an old and established tank.
Otherwise, your best chance is stripping.