Sideslip may or may not develop, that's a function of a host of external factors, as well as the rudder response (or non-response, or over-response) to them. Any effect that the dihedral has is a result of this sideslip, and not of the bank angle. If you're over-ruddering the turn (ball to the outside) then dihedral will tend to increase the bank, not return it to level.
Anyway, there's a common misconception of dihedral's function (It's looking now, that that's not what you meant, but the poster a few replies from the top certainly did with "The inner wing is flatter to the airflow") that says that the inner wing's bigger projected area over the ground, somehow translates to an aerodynamic significance. And this is not true: you can have a plane with (ridiculously exaggerated for effect) 45 degree dihedral at 45 degrees of bank, so the inner wing projects 100% of its area over the ground, while the outer wing projects 0%; and as long as there is no sideslip (ball is in the middle, airflow is straight down the fuselage) this fact has zero bearing on any force on the airplane.