[WKB]

Where is it that He does refer to her as Mother?
I would say you are being more presumptuous
than WM. He has Scripture for backup and you don’t.

[Petronski]

Where is it that He does refer to her as Mother?

Very little of what Christ did in day to day life is recorded in Scripture. By your logic, He thus never did them.

Sola Scriptura is a false tradition of men.