Obituary from The New York Times. Susan is quoted regarding the final scenes she and Bill taped together.
'He and his wife taped their final scene together on “Days of our Lives" just weeks before he died.
“The last scene I got to play with him is about how much we love each other,” Ms. Seaforth-Hayes said in a phone interview, “and I was blessed with an opportunity to hover over the words ‘Have I ever told you how much I love you?’ And Doug answers, ‘No, you never did.’ That was something Billy and I would say frequently in life.”'
https://www.nytimes.com/2024/01/25/arts/television/bill-hayes-dead.html?unlocked_article_code=1.QU0.mC2C.HtGyE8ywThpW&smid=url-share