Turns out that Marla's grandfather and my grandfather were brothers, which would make she and I full second cousins. It seems that she has spent a good deal of her time doing genealogical research into her family tree, which is how she came upon the Sproule Branch of this particular family tree. "Stunned" is probably too strong a word to learn about the existence of a cousin that I never knew I had. "Oh, you have more cousins out there than you realize" is now she put it. She even told me about another cousin, Casey (again, I'm withholding the last name) who lives here in Pittsburgh. Casey's grandmother is the sister of our (Marla's and me) grandfathers.
I know that some may be thinking "Internet scam" here, but I am convinced after talking with Marla and looking at both Casey's and her Facebook pages I that there is nothing of the sort going on here.
Again, I am not sure exactly how to describe how I feel about this. It seems like something that you would see in a movie or a TV show. I find that it is kind of a cool experience to learn about family members that you didn't know that you had. Not sure where this will lead, but I have to tell you, I'm happy about the whole thing.