Your girlfriend and I are simply going to take turns teasing you.
You will be with me for 15 minutes.
Then you will be left for 15 minutes.
You will then be teased by your girlfriend for 15 minutes.
Then you will be left for 15 minutes.
And so on, and so on, until we are bored.
You are free to cum, whenever you like...
However if you come whilst one of us is teasing you, then whoever has the next 15 minutes with you gets to punish you, however they see fit.
Shall we start, you want to se who i am don't you?