to start, get some good mdma and a a few bottles of champagne.
get her to give you a strip tease. if your into it ask her to tie your arms up and have her tease your dick etc. etc.
when you had enough of that, tie her arms behind her back and have her deepthroat you, if she cant do it anyway. take turns fucking her face/pussy while slowly working on her ass, if she hasnt done anal before. finish where ever.
all the whilst topping up on mandy and drinking champagne.
good music is a must too. be sure to fuck her all over the house too.
i did this with my gf my last bday, which was also a few months before we broke up. literally the best memory of my relationship and maybe in the top 3 sexual experiences
god damn im hard as fuck just thinking about it.