Every girl is different so you'll have to learn what works for her. For instance, foreplay works for my girl, but if I make her cum, she tightens up because her muscles contract so hard when she orgasms. Then you have to start all over again. She even told me it's really uncomfortable for her if I keep thrusting as she is cumming (I'm 6" girth). So yes to the foreplay, but be patient and keep learning her. Treat her like a work of art that you are studying and learn how she reacts to everything.