Well, not a wife's case or experience this time - and not exactly about money.
But when I (husband) was a young university student living away from home and eating poorly, then I met an older woman around her 50s. A caring and loving lady kinda chubby but with a large smile and so we started talking and such things like close friends. What was nice but also odd.
She was always worried that I didn't take a proper care with myself and one night she finally invited me for dinner. I was welcomed with her dressing a very open blouse displaying her large breasts and with a very generous plate of lasagna for me. Yes, a fucking hot lasagna with mountains of cheese to my disposal.
I ate like a war plagued man and of course, as my youthness could afford I also managed to fuck that good lady's chubby pussy twice. She kept kissing my cheeks the whole night like I was a toy or something.
So for some months almost every week I had a date with a hot lasagna, I mean with this lady that I wasn't particularly horny about. But our deal prevails: the lasagna in exchange for a fuck!
Good cheesy times!
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About wife: No, not for money. But in the past she kept seeing a man for a while because he was such 'a gentleman' and loved to pay expensive hotels and restaurants. She wasn't thrilled by the sex anymore, but felt like to keep being pampered and knowing new places. In exchange for her ass, of course.