Can't blame him. I've been in situations where I couldn't sit back anymore and had to jump in and lick both my wife and the guy who was fucking her. I fucking love it! Feeling his shaft slide along my tongue as he thrusts in and out of her, tasting her on his cock, licking her clit to intensify the pleasure she's getting from fucking another man, and carefully licking his balls knowing that by doing so those balls are going to pump even more cum straight into her and he's going to have an even more intense orgasm as he takes my wife right in front of me... it's heaven.