Sara, I sure hope that you can keep Jupiter. Please try to talk to your sister and explain how you really feel about him and how Tinky loves him too. I just can't imagine Tinky without Jupiter. I also hope that you can rescue the kitten. I sure hope that your sister will realise how attached Jupiter is to your family and will reconsider and decide to adopt the kitten instead. Then your husband can visit the kitten. Please keep us updated. Good luck.