If you have a man in mind..and both you and he are on the same page with it...make it seem to your wife that ge is down and out and needs a place to stay...as a few days go by...there is shower time...everyone watching tv in sleeping garments...and if you have a hot tub...bingo...when the 3 of you are soaking for example...excuse yourself and leave them alone...it takes time..but once he is able to penetrate her vagina...you are set..good luck