How sad for you.
Last fall a momma and 3 kittens showed up in our barn - we immediately started to feed them and our daughter fell in love, because the kittens let her pick them up and would play. Momma disappeared after less than a week, but the kittens stayed and we kept feeding them. They were also gone within 2 weeks.
I have absolutely no idea what happened to them, but my daughter still gets upset about it every so often. She loved the idea of barn kitties and was very good about making sure that there was food and water for them everyday.
I'm waiting for one of my friends that have cats to wind up with a litter they wish to adopt out - so that my daughter can have her barn kitties. We have dogs - so there will be no kittens in the house.
I still miss my two cats, and dream about one of them every so often: my sweet little Black Kitty. She was special because, for some reason, she was totally wild, and would run away if anyone ever went near her. Anyone except me.Why she picked me out to love, I don't know. But she was my friend for 12 good years, until she disappeared without a trace.