It's a tragic scene under the surface, she finally has enough control over her body to reject him but not enough over her life to go on without his money.
Education for girls wasn't quite as big a thing back in the 1950s, but still, the lack of consistent schooling would still have barred Lo from what few legitimate professions were available. As Charlotte Haze's husband, he stole what would have been Lo's inheritance; remember that Charlotte was wealthy, and that Humbert found her tastes crass, I doubt that Lo would have been allowed to keep a single trinket of her mother's.
Humbert took just about everything there was to take from Dolores, shy of cutting her open and taking her fucking kidneys. Him giving money to her in the end wasn't a sign of his love; he was returning what was left of her property in exchange for the name of his enemy, the man who bested him, because Humbert Humbert
always had to win and there was no way that he was going to let that shit stand. Humbert was better than anyone else, he was certainly smarter, and he paid up so that he could prove it.
Even at the end when he says, "I loved her!" he has to mention all the unsightly adult characteristics of her body, convinced that this makes him some fucking high minded martyr. A non personality disordered individual, thinking of a lost love, would remember the time they spent together: sex, certainly, but also the long conversations, walking home in the rain, sharing a pina colada at the bar. Humbert Humbert: "She's got hairy legs and some random put a baby in her, but I love her anyway! I'd totes take her on another extended road trip! And the baby too, I'd be the best daddy ever, especially if she has a little girl that grows up to look
just like her mother!"
True love, ladies and gents. True love.
