Jake Wolfe & Netty Fehr?

My Dad, Jake Wolfe, had a son before he married Mom.No one in the family had ever mentioned it. The only thing that was passed on that the woman's name was Netty? Fehr .Probably in northern Sask. or Southern Manitoba
where Dad went to help his uncle harvest. This is a picture of Dad and a very slim Lady and a small curly haired boy in front of them. Could this be our missing Half Brother?

Could this be Netty Fehr and their son? Do you know the woman and boy in this picture?
People in photo include: Netty Fehr and Son of Jake Wolfe & Netty Fehr