I might have missed that actually. Sorry about that. Then it's indeed about the precedent you already set.
The general principles still applies tho. Do something else for a while before doing dinners again. And when you get back to dinners, set the expectation early on - that you're splitting the bill.
You can warm her up to it too, tell her "omg I broke the bank on whatever whatever oh god I'm so broke right now, hope you don't mind splitting on our next meal, change the topic." If you feel playful, puppy eyes, like kitten eyes, then "Will you be my sugarmommy?" It's just a joke, never say shit like that if you're serious. Or idk do it for science but I can't guarantee the outcome!
I have this friend; he was 31 when he dated this super hot 18 year old girl. Like that isn't bad enough, she paid for everything. He's very good at eliciting emotions, and getting those motherly feelings of compassion out of women. Like, when he talks to women on the phone, it's like hearing a cat purr. It's all baby talk. It's ... It's
uncanny! For lack of better words, it's zero logic and only pillow-esque emotion-talk. It's more of an emotional connection over voice than an actual conversation. And it puts these women into some kind of a trance-like state.
When they started dating, he lost his job (I mean, of course he did), and talked with her about it (again, with baby talk - hard to explain, like the entire thing is an emotional humm), so .. they agreed that he should move into her little girl's room at (wait for it) her
parents house! And they agreed to it too!!! I tell you, this guy has some serious social superpowers. After a while the parents got fed up with it, though. So... They had them move into this big city apartment they owned. For free!!!!!!!

A big, beautiful central apartment, for freaking free! This guy shot the golden goose or something. While dating a girl 13 years younger than him. Wtf!
Well, after about a year of dating, they broke up. But stayed on good terms. The parent thought it was kind of unfair that he still got the apartment for free, so this time he had to pay rent. So, they agreed to charge him 100 dollars a month... I'm fairly sure they still lost money on the deal. And he kept living there for like five more years or something, until he met the girl he's living with now.
What an amazing piece of work. Definitively worth a scientific study.