Not to burst your bubble, but this doesn't sound like a movie; it sounds like a documentary of most of the lives of most of the married guys who come into ABS. If wifey took care of business at home, he won't have enough cum in those balls to need to get off. Of course, even after screwing the hell out of her, some hubbies still look forward to some hot meat to suck or fuck them.
Your story needs more suspense, and jazz not just jizz. The wife and hubby should start to fool around, and then she gets pissed off when he asks for that dirty stuff; suck my dick, let me fuck your ass, fuck my ass with a dildo. etc. She leaves him high and wet with a raging hard-on. Make it her fault that he needs to go into that ABS to relieve the cum she stirred up and refused.
When he gets into the ABS, he needs to spend more time looking at the merchandise. Let him gravitate to the gay section, and begin to wonder what it would feel like to suck dick or get fucked. His mind dreams off into some hot scenes. When he comes back to reality, show his stiff boner tenting out his pants, the boner that bitch didn't take care of. He seeks the booth area because he can't leave like this. Make him squirm under the gaze of the other men licking their chops at his boner. When he gets into the booth, he forgets to lock his door. Let some guy walk in on him jerking off. He stares in shock as the stranger asks if he can help him. The stranger drops to his knees and offers his mouth gaping wide. The hubby looks at it, imagines his wife's gaping pussy instead of the bearded mouth. He shoves it in moaning "Take it bitch."
After he humps a load down the stranger's throat, he opens his eyes to the truth. This guy sucks dick better than his wife ever did. He begins to wonder if man pussy is better than bitch pussy. He also wonders why use a cold lifeless dildo to scratch his anal hunger when there is hot, dripping real meat waiting to bust his ass. Continue the man's awaking to the lust for men that he has always ignored.
Subsequent scenes can show his continued education as he journeys into cruising the parking lots, looking at those guys standing around as fresh meat not just passer-bys. Show some hot action in the work place bathroom where a simple jerk-off culminates in his taking a load of cum down his throat from a fellow worker. The story can continue until the day his boss calls him in to discuss rumors of what he has been doing in the company's restroom. As the hubby enters the boss's office fearing possible firing, the boss locks the door behind him. Removing his tie, the boss just says "I've heard serious rumors about you and some going ons in the men's room." As he unbuckles his pants, he continues "But I don't believe in rumors, I want to find out how good you are myself." Show the hubby sliding off his chair, on his knees in front of the boss.
As a final twist, you can fade back to the wife laying in bed alone. She can press her face into his pillow and cry "Why am I losing you. Didn't I give you everything you wanted?" She pulls a vibrator out of the night stand, and tells it "I still have you."
Does not give you a few ideas?