Fucking good ! Having your wife being fucked by another is such a turn on although it can be "painfull" the first time you learn your wife has cheated on you. You go mad but you also get hard ... imaginating ... fantasizing ... and when you wank the first time immediately after, you are surprised about the intensivity of your orgasm ... and even if you suffer you want her to fuck again with her secret lover to masturbate and give yourself another strong orgasm.
You want to become the perfect cuckold who will be the only one who doesn't fuck her anymore ...