omg we're talking about the w-word already ??!?!?!?
but yes, spoiled!reader will have a veryyyy expensive wedding dress. most likely custom-made, expected to be one-of-a-kind from the designer. that dress would be featured in vogue. andddd she will probably have 4 different dresses-- one for the rehearsal dinner, one for the main ceremony, one for the marriage certificate signing, and one for the reception. because duh!
instead of baby fever, spoiled!reader would get crazy fiance(?) fever lol. I imagine her sending leah hints but in like the most obvious way: purposely leaving wedding magazines around the house, telling her "when I get engaged I would love a pink sapphire diamond" when they're at the jewellers for a different gift.
they could be having dinner one night and Leah would be like "so what are you doing tomorrow, baby? any plans?"
spoiled!reader would perk up in her seat, pausing from taking a sip of her champagne. "yes, I'll be having lunch with helen rose"
leah would be confused for a moment, racking her brain trying to remember if that's one of your friends or some reality star celebrity from one of those trashy (complimentary) TV shows you watch. "don't think I've met a helen rose..."
at those words spoiled!reader would stiffen slightly. she'd tighten her grip on her steak knife inconspicuously, some weird emotion bubbling lightly on the surface but she forces it out of her mind as quickly as it had formed. she continues cutting her steak, albeit this time a little rougher: "I would hope not, leah. she's a wedding dress designer."
and leah would just stare at her, pausing for a moment as she recognised the slight bite in her girl's words. when she gets nothing more, she figures it was safe to continue eating her dinner. "yeahh I don't think I've met her, but that's nice, baby. tell me how it goes"