My wife has had at least 10 that I know of since we've been married. There are probably lots more that that have felt her pussy around their cocks that I don't know about. No telling how may sloppy seconds that I've had after she get home from a evening out with her "frinds." I like seeing her pussy like this knowing that there has just been a big hard cock in there.
The way she's looking at the camera while sucking that cock, I don't think that that's you. Seems like she's saying, "how do you like this, hubby?" Very sexy, that's the way I want my wife to look at me while she's sucking some strangers cock.
She and I like to send pictures to guys that will respond and tell us what they like about them. It is really hot when they talk about liking her hairy pussy and things like that.
I can tell by the look in your wife's eyes that she is a true cock lover. It seems like you will be her full time cuckold, hope it makes you hot watching bulls fuck your wife.