Our Favorite Fantasy

This hasn't happened yet, and may never happen, but I often think about to speed up an orgasm. My wife is bisexual, and we both love receiving oral sex, so my favorite fantasy is for us to meet two young girls, possibly travelers who need a place to stay (we live in Hawaii so our place is in demand for visitors, so this is not entirely unreasonable). They are not necessarily lovers, but one is at least bisexual, and they let us sit or lie back while they service us orally. We look at each other, and at the young ladies eating us, and they glance back while they suck and lick us. I love watching my wife get eaten out by another woman, and that alone turns me on tremendously, and also like being watched while I am sucked off by another woman. My wife will hold my hand and both say "I love you" while our orgasms build, then we simultaneously start cumming and focus all our attention on the wonderful mouth treatments we are getting. My lady swallows my semen, the other lightly flicks my wife's clitoris as her orgasms subsides in waves, and then they look at each other with a sense of accomplishment.