what if your wife tells you to do it? if you say no, then she might not be satisfied!
For one, my wife would never ask me to suck another man's cock ... never! She said the same thing about going down on another lady, but then we hooked up with a very, hot, 23 yo redhead bartender at our local Outback Restaurant for a few years back ... she went down on my wife and gave her some awesome orgasms while I fucked that cutie from behind, and my wife felt obliging to do the same to her. It was one of only a few FFMs that really worked out for us. Most the girls in FFMs were lez and had the hots for my wife. They'd play with us but would want me to fuck my wife not them. But, we've had a few that did work out great. We're both pretty much hetros however.