I watched part of the Hugh Jackman version of the musical Oklahoma! recently, and this is one, just like the movie version, has “They do not live happily ever after” written all over it.
Curly, even when played by the gorgeous Jackman, is one of the most loathsome “heroes” of any musical. In the first scene of the play he tells an elaborate lie to Laurie about the rig he’s going to take her to the dance in- “Oh, it’s gonna be the sharpest ride in the territory, snow white horses and fringe on the top, etc. etc.”, and then when she’s eating out of his hand he says “I made that whole thing up, bitch, if you wanna go with me you can walk behind my horse”. He laughs at how upset she gets with him for his lying- clearly has no clue about the female temperament or even common decency.
Then there’s how he treats Jud- that’s downright sociopathic. Alright, true, Jud is deranged; he’s a porn loving recluse who may have murdered his last employer (never proven), BUT all that Curly knows for absolute sure is that Jud has the hots for Laurie. Does Jud have a shot at Laurie? Hell no, he’s ugly and mean and creepy and while she might go to the dance with him she’d never in a million years marry him and Curly knows this.
But what does he do to get Jud out of the picture? Does he go to him and say “Look dude, I don’t like you, I think you’re a creep, and if you ever touch a hair on Laurie’s head I’ll blow your damned head off”? Because if he did that I could respect it. No, instead he pulls some Hannibal Lecter shit and tries to talk Jud into suicide (though in an admittedly, if somewhat perversely,beautiful song). You want Jud dead but you’re too cowardly to even confront him or too lazy to do some research into the murder of his former employers to get him arrested (and, likely in Oklahoma in 1908, hanged)?
So just in two songs (Surry With the Fringe on Top and Poor Jud is Dead) we know that Curly is a coward who loves to play mind games and doesn’t even care about Laurie’s feelings, he just doesn’t want anybody else to happen. Oh, and he’s also a narcissist- praises himself constantly in his songs and takes offense at any slight. Killing Jud in the end is certainly justified (if only for that really terrible dream sequence I’ve never understood why they included), but I fear it sets a dangerous precedent in Curly realizing he can kill without even having to go to a trial.
My best guess for their future: Curly and Laurie come back from the honeymoon. He proves to be no good at running a farm- he’s a cowman after all- so the place begins to go to seed. As sex with Laurie becomes routine and she has a kid or two his eye probably begins to wander. Sooner or later he comes back from Kansas City with the clap (“Everything’s up to date in Kansas City/except for the whore’s vaginal exams”), but, with his skill at mind games he’ll convince her it’s her fault for not being a better wife to him.
Then somebody strikes oil near the territory. Curly realizes he’s likely sitting on a Plainview Milkshake goldmine. The trouble is the property belongs to Aunt Eller, and she’s still healthy. Thus Laurie, nursing their son, deaf to his father’s veneral diseases, is surprised to hear Curly and Eller singing a duet one day- “Aunt Eller’s daid/we laid her in the shade/her rheumatiz and cat’racts gone for good… Good!” and even more surprised when Aunt Eller accidentally throws herself down the well. Then Curly inherits the land and sets off on a land buying Bonanza.
Of course by this time he’s long been having an affair with Ado Annie, very lonely ever since Will went to prison after turning to drink after their baby was born with decidedly Persian features and then shooting the two plowhands and the ice salesman he caught her in bed with. Annie of course was heir to her father’s considerable spread, and suddenly she makes him her business manager for all kinds of promises about what her field will yield, though it turns out he already drank her milkshake.
So Curlie gallivants with a young harem all over the state and throws money at Laurie from time to time but has long since left her in all but fact. For some comic relief one of his floozies has a fetish for dressing up like animals but is also addicted to the legal narcotics of the time (dealt with in the song Furry with the Syringe on the Top). The final scene is Laurie looking on in terror as Curly kills Ali Hakim with a bowling pin.