My clubs have private spaces for hosting swinger parties, and it's a pleasure to be of service in that way. Women should be shared, whether at someone's home or in a club. It's great to get rid of inhibitions and just enjoy sex.
Any woman with your interests should be able to make friends anywhere. MFM is fine for both the woman and the man. Every woman should be shared with other men.
Does she use those panties to hold the cum in until she can have you lick it out? Many women I use do that, holding back their leakage with the panties.
Inside every conservative woman is a slut, just needing the right treatment to be let out. I know of some that have changed as you described your wife's change. Always a pleasure to see the difference and to be a part of that change. No matter how conservative a woman might seem when men start...
It is also a good position for fucking from behind. Making those big hanging tits bounce and swing with each hard thrust of cock into her cunt. Also easy to adapt to spitroast to share with a friend.