Move the dial on the right, so that the orange bar with the heart is filled, but the green bar on the left is only filled below the lightning figure, otherwise Gulya gets too excited and bites Said's cock (blowjob), who threatens her with a gun if that happens. If you fill the orange bar with the heart without overfilling the green bar, you pass that scene.
The green bar fills up quickly if you move the dial from one end to the other. So move the dial just a little until the orange bar stops filling up, and then gradually again without sliding it from one end to the other.