All women are whores, bitches, or sluts or even a combination of the three. The sooner you face that fact... the better off you'll be.
Oh, and your wife or girlfriend probably fucks plenty of other men when you're not around. It's very common place now. There are also plenty of willing cocks just itching to slide into her pussy and they don't give a fuck that she's taken, in fact, they see it as a challenge.