Mine...
When my wife and I started going together 38 years ago, she let me drill holes through her carpet and hardwood floor so I could run Fulton Gold speaker cable from the entry closet she let me have as the system's electronics rack to my cobbled-together DIY speakers in her living room. (That's not why I asked her to marry me, but if you've ever seen Fulton Gold, you know how big a "give" that was.)
When a local dealer closed up shop here a few years ago, I brought home a purchased pair of his demo Paradigm bookshelf speakers and mentioned that he had a pair of demo floorstanders available. "They look like these?" my wife asked. "Same finish, same width, but taller," I replied. "How much are they?" she said. I told her. "Then I'll pay half, Jim."
She'd never call herself "audiophile", but she has a good ear and an appreciation of good music. She may shake her head (sometimes vigorously) at the way I've "decorated" the walls of our bedroom and living-dining room with acoustic panels, but she hears the difference they--and power cords, interconnect and speaker cables, and DACs--make. So you're not the only one who's been lucky.
For the rest of you who are unattached--sorry, she doesn't have a sister.