You can generally hear and see on her facial expressions if she's enjoying it or not, keep speeding up or slowing down until you hit the sweet spot, doing this will make her come much faster. Note that she will have to be shiny with sweat before she can orgasm and you may have to "reset" the fondling/penetration by simply clicking on the mushroom and speeding up once again to the second phase. Note: Quiet seems to make sounds of arousal more subtle and harder to react to.