Big hugs to you, your husband, and Henry. It's always hard to know if you did the right thing at exactly the right time, but it's very clear you had her best interests at heart and that's what counts most. All of my cats are over 10-11 years old, one with chronic renal failure (at this time being well treated with medication and diet, but I live in fear of the day you describe), and I only hope that I'm as able to make the right decision as you were. Goodbye, Sophie Kitty, you will be missed.