I'm sorry, but I don't think you are going to find any solutions to handle the situation here. The situation is very sad. Bottom line is the deal that was struck was not clear cut and defined, no matter how you feel or what you think, if it was there probably would not be so much controversy about it. I hate to beat a dead horse here, but even I found what you did as shocking. You took birds from a woman who said she was mentally unstable. She needed time for herself to get back on her feet. You offered to give her birds back- the wording is moot. I'm sorry it is, if someone said to me they would give them back I am expecting to be able to get them back- all of them back. The one word you are arguing is ridiculous, you should have stated clearly- you may have X number of birds back, at my discretion . The short amount of time you had them- one month is really not that long, and the fact that you sold some of them really rubbed me the wrong way. One month is not a long time. I have had house guests longer. You sold some of the adults, she clearly said she was having financial and mental issues she needed to work on. So maybe she could not answer back, for either reason. If that was the case you should have contacted her in another way- face to face. She said you could sell the babies to recoup financial losses- not the parents- and the fact that she said you could sell the babies leads me to believe she was let you do that to help with the costs until she could take them back.
I am not on her side. I am merely stating my opinion. I am on the birds side. They deserve something much better in this situation. I don't feel, in the parrots best interest, they should go back or stay with you- but the law is held above any of my feelings.
I hope we can all clear the air and move on. Their is nothing much more to say other than arguing, which is never attractive or helpful. I hope everything works out in the best possible way for the parrots.