Go down on her for one hour at a minimum. Then get up and DO NOT fuck her yet. Have a bottle of wine and continue to tease her.
Start it up aain with a light massage (use some type of good smelling oil). Go around her pussy again after a bit of massage (15 mins or so). Lightly touch her pussy lips and massage her mound BUT do not hit the clit or go inside.
Flip her around again, and this time stick your tounge deep inside her, take one hand and massage her clit, and the other to take her pussy juice to lube her ass up a bit, stick only the tip on one finger in her ass, while the other hand is playing with her clit and your tounge is inside her pussy.
Then give or take anything that you want, she is all your times 1000