Rhodochiton 'purple bells'

Bought a hanging basket of purple bells as a gift for a friend who is celebrating her 60th today. Happy Birthday S. We were in high school together many moons ago!
Actually I have just returned from the open home the birthday girl had this afternoon. Took Mother with me and she had a lovely time chatting with all and sundry.
My friend S has a lovely white amaryllis lily flowering in her lounge room and there is a pink one about to bloom. They are so beautiful and perfect in every way. How can that be?

(Will attempt to back post asap)