Hiya Bambina,
Sounds like a hot encounter indeed!
My only suggestion would be trying 'vanilla' sex before acting out the fantasies... you can still be kinky/passionate/hot/wet/wild, but be yourselves.
my first time (for all intents and purposes this is sort of your first time) I was nervous as all heck, let alone with something so big and acting out a fantasy![]()
btw- your Dom sounds great. He surely sounds like he knows what he's doing. It's good to be in good hands.
good luck!