Why does Ariadne choose to marry Hiram Broadbent instead of Baldasare in the story, The Underground Gardens?

Through Baldasare's regular weekly visits to the drugstore, Ariadne learns that he has a big house and that he is interested in her. She agrees to see his house, but is mortified when she finds out it is underground. She rebukes Baldasare, refuses to see him, and promptly gets engaged to Hiram Broadbent.

“Twelve room, I tell you, twelve room.” He’d become insistent, and he had his hand on her arm, trying to lead her down from the carriage—if only she would come, if only she would see—and he wanted to tell her how cool and fresh-smelling it was down there beneath the earth, and how cheap it was to build and expand, to construct a nursery, a sewing room, anything she wanted. All it took was a strong back and a shovel, and not one cent wasted on nails and lumber and shingles that fell apart after five years in the sun. He wanted to tell her, but the words wouldn’t come, and he tried to articulate it all through the pressure of his hand on her arm, tugging, as if the whole world depended on her getting down from that carriage—and it did, it did!

“Let go!” she cried, snatching her arm away, and then she was sobbing, gasping for breath as if the superheated air were some other medium altogether and she was choking on it. “You said … you said … twelve rooms!”

He tried to reach for her again—“Please,” he begged, “please”—but she jerked back from him so violently the carriage nearly buckled on its springs. Her face was furious, streaked with tears and dirt. “You bully!” she cried. “You Guinea, Dago, Wop! You, you’re no better than a murderer!”

Three days later, in a single paragraph set off by a black border, the local paper announced her engagement to Hiram Broad-bent, of Broadbent’s Poultry & Eggs.