Having a slut wife is more than having a slave that'll suck your cock whenever you want. You need to teach your slave to have the proper respect for your cock. To adore it. And crave it. And to want to make it spurt its holy liquids all over her body. 

I make my slut worship my cock at least once a week. In the beginning, I would force her to kneel before me, naked and exposed, her hands clasped behind her back. I would stand over her, and instruct her to kiss every inch of my cock, without using her hands at all. I would have her kiss and lick my balls, sometimes mashing them down against her face, and sometimes standing just out of reach, forcing her to strain to reach them with her outstretched tongue. And I would crouch down onto her face and order her to clean my asshole, using her tongue to swab the outer rim, and then force her to thrust it deep into my anal canal.

Now that she's beginning to be properly respectful, I make her worship in a way that's more comfortable for me. I'll sit on the sofa, with a bit of porn or a movie on the TV. She lays her head across my naked lap, so her mouth is in easy reach of her owner's cock. I like to keep her bare breasted, so I can play with her tits as the mood strikes me, or slap them if she's not doing a good job. Sometimes I'll shove a butt plug up her ass, or put a vibrator in her cunt, just to see if it distracts her. Then we begin the worship service. Her job is to continuously kiss every inch of my cock, from the slit in the tip down to the base below my balls. When her lips aren't kissing, or her tongue isn't licking, she must tell me how much she loves it. How big it is. How hard it gets. How good it feels when it punches inside her tight asshole. And then she has to get back to kissing and licking every inch of it, every inch of my balls, and my entire crotch. 

Only I can say when a worship service reaches the end. Sometimes it takes 10 minutes. Sometimes it takes more than an hour. I try not to cum during the service, because that would send the wrong message. My slave needs to always understand that I, and only I, decide when and how to cum. Her job is only to worship the cock.