That is a very pretty Crinum, is yours fragrant?
The posture of those blooms is different on the one I have. Yours are draping and shaped like a trumpet. The blooms on this one are more open like a lily. I'm thinking it is still a different one.
My friend came by today and looked at it again. We calculated that she gave it to me over 35 years ago. She also remembered her Grandmother growing it.
The closest Crinum I have found was on the Jenks site. It was Crinum x Sugar Cookie.
https://jenksfarmer.com/produc... Their description says blooms in September and the blooms have more shading of pink in them. Closer but no cigar...