As I understand it, pelorics can be pretty unstable.
They can change from year to year, or as in your case, the keiki is "ordinary" while the mother is peloric. I'm sure also, that "once peloric, always peloric" is the case with some....
One of those sweet surprises in the orchid world.
But then, what do I know, nuttin, I know nuttin!
You tickle yours so often I'm surprised they don't open laughing! Of course, the smile they bring to you and all of us here is close to that.
Al