If you want Karen to like you sooner than usual, there is ony one thing you need, you dog! Holding you pooch, go talk to Karen. She will say that your dog doesn't look to clever. But continue to show your dog to her and her heart rate will steadly climb after a while, so It's possible to have Karen at a pink heart by the first of second day on your farm. I don't believe it works for any of the other girls, but still try it out.