[weasel]

i say no you are in a committed relationship and what you want to do is cheat, if you give her oral you could refuse to do it unless she does it for you, if you don't then YOU need to suck it up, if she is fine with swinging then that's a horse of a different color, but in your situation and what i know about it i believe that going to someone else for a BJ would ruin your marriage