Key point is lots of foreplay and doing it right.
Dim the lights, turn on some music, drink some wine.
Ask her what turns her on. Where is her favorite place to be kissed?
Don't just focus on down there. Explore her inner thighs, neck, collar bone and her whole body over and over again. Gently caress her skin and give her small kisses all over. Remember lots of kissing and making out.
Whisper dirty things in her ear. Tease her until she beg for you.
Good luck...