I don't think it would be right to ask for her back. I know that if I adopted an animal, I'd be attached on the first day. After 4 months, I would never even be able to dream of parting with the animal and it would break my heart to even be asked.

I'm sure you rehomed them for a good reason. Weren't you too full on cats? Just know that they are happy and you did what was right for them. I did not want to let go of Lucky and Chance, but I knew I had to. I was too full of foster cats and the home was a great one that I had no reason to turn down. I miss them with all my heart and still often cry about them. But I know its for the best.