Mary Lou's Christmas Cactus

The mother plant of this one shown had belonged to my fiance's grandmother, who had acquired the plant from her own mother, his great-grandmother. It could be at least 100 years old or close to it since Mary Lou was 92 herself! Anyway...my piece of it bloomed on the day of her viewing after she passed away and started wilting today when I got the thank you card from her daughter for the flowers.