Finch asking Parakeet to feed?

Really weird. My cat brought in a little female finch, somehow her wing got messed up, not broken, but she can't fly right. She is one of our pets now. I have had her for quite a while now. Anyways, she got sort of lonely, so when I was at the pet store picking up some aquarium supplies, I stopped by the bird section and got a cute little parakeet. I don't know was the parakeet's gender is. Yesterday, the parakeet (Lollipop) was playing with its favorite toy, a little bell hanging on a string. It was sitting on a rope near the toy, as the finch was sitting on the perch next to the bell (which is right beside the side of the side) so the finch was taking up the only spot next to the bell. The finch doesn't play with the bell toy, so I was wondering why she was sitting there. Lollipop (parakeet) wanted to get the finch's spot and (was sitting on a rope) started to move over so it could get next the finch. Well, when Lollipop started to move over (walking on the rope sideways) the finch stuck her neck out, opened her mouth and squawked like she was a little baby wanting to be feed by its mother! The finch did this several times, each time the parakeet came over. I know parakeets feed each other and groom each other (Lollipop has groomed the finch before) but I didn’t know why the finch did that, can anyone explain?