Either a misnamed plant or a sport...
Either way, a pretty flower.
This Amaryllis is a few years old to me.
However, I also have another "Pink Flush" that actually blooms pink, not red.

The above flower is a natural rebloom, not a forced bloom. It has always been red.
Reblooms usually happen around May for me. This year, it was a bit late. Natural does what Nature does. I don't do anything special to get my amaryllises to rebloom. They are all pot grown indoors.