|Title: A good title, but one that does not necessarily capture the true essence of the piece. Is this about Sunday tea? Afternoon tea? Tea with the Queen? Your story has to do with death and sadness and you want your title to give us a sneak peak into that; it should draw us in and make us want to read further.
Subject Matter and Theme: I've read (and written) similar plots and I love this subject matter. It's sad and haunting and, unfortunately, all too often, true-to-life.
Flow and Readability: Well done. I see no problems or issues with the flow of this piece.
Tone and Imagery: Good use of sense, sight, smell, feelings. You could see the white blank ceiling. You could feel the cold, grey winter morning and the warm cup of tea in your hands. I especially liked your description of a "dreamless, death like sleep", as it gave us a peek into what was to come without giving anything away.
Possible Suggestions: Nothing major. Well done!
Final Thoughts: The only issue I had was this: if her tea spilled on the floor, did she drink enough of it to cause her death? Otherwise, the story was great!