Put yourself somewhere the 2 will be. Dose the guy w/ roofies or xanax, then start putting thoughts in the wife's head. Try and start them into an argument while he's in a daze. Or just wait till he nods out and work your way into her panties. Just remember to leave a visible mark on her, hickey, bite mark on thigh, torn anus, etc. If its a BJ in the shithouse, make sure you cum in her hair.
Moral of the story: Never drug someone you are trying to fuck. Drug the friend that's trying to keep you from fucking.
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"Guage once told me that there is nothing worse than eaten ass of a black dude thats been huffen drain cleaner the night befor." - delanoojos