Hmm… bête first you just relax and take it slow. Try to reduce her fear through foreplay or other sexual activities, Slow down. And listen vagina is very small and flexible. So don't punt quickly, first try with the finger, use lubrication... But you have to be very relaxed and also have to be very supportive during this time. It is not necessary to go inside the whole penis once, and it is not considered. Read this about https://lovematters.in/hi/news/first-time-sex-top-five-facts https://lovematters.in/hi/resource/ways-make-love If you would like to join in on a further discussion on this topic, join our discussion board, "Just Ask” https://lovematters.in/en/forum