So what's the call here?

[booker227]

I don't see obstruction. I believe that at least one of two things must happen for there to be obstruction. One is physical contact with the runner and the defensive player who isn't in possession of the ball, and second, the progress of the runner must be so impeded that the runner stops, changes direction, etc., and in the mind of the umpire the defenive players position forced the runner to change her progress.
You don't have either here, so there isn't obstruction.