2023 Update: After crossing this with a most reliable breeding tet (for me) with Sun Bear as a pod parent, and using many dip pollen parents, it seems that Matthew Martin is definitely misidentified as a tet. It appears to be a fairly pod fertile dip as I collected great Matthew Martin x DIP pods and not one TET x Matthew Martin pod.
I'm disappointed that I didn't do more research into its one kid- I would have seen the dip registration and possibly not bought it. Yet, I'm not disappointed with it as a flower and I have some hope for it as a breeder for what I'm trying to achieve although I am further ahead in the TET seedling department.