It's a mutation that happened in a spot that only affected part of the flower ... the seeds from that flower might produce some seeds for peach and some for cerise, but it's unlikely that the flowers will be split like that on the descendants.

Maybe if you propagate it you can make more plants like that one!

very neat! should watch to see if it happens again on that same branch.

do the other flowers on that plant have that many petals? It almost looks like two or more flowers clustered together; I can see at least three stamen.

Abfab, would love it if mine did this!

I just found this one in a hanging basket next to my green beans