A small wish every 2 weeks...MC is kind of dumb lol....If she could not tell the money is not fake at a first glance (counterfeit) then she just need to buy a wig then go to a big shop/corporation who exploits their workers and buys some stuff...Okay sure you people can argue about the horrible bad moral issues dealing with that but eh MC can still use the money technically if she wants to take that 1-3% risk of getting caught assuming the create money is identical to their currency XD
MC's new GF can make a small wish per 2 weeks...If she can make money appear out of thin air(Create material out of nothing which defy the very law of reality, assuming she is just not turning the molecules in the air into another form of matter...) then would it be possible for her to create silver, gold or gems? Even a tiny 1gram of gold is worth about at least 70-80 dollars...a small wish hmm, would it be possible to cure a person sickness or heal a small injury (Small cut or broken arm?). Though even without the star GF's wishing power she is a pretty decent catch (Good look and willing to love MC)... I bet they will get into all kind of hijinks during school life where MC will try to use her new GF's wishing powers to try to woo another girl before eventually discovering how awesome and wonder her star GF truly is in the end...
100% made in China huh...W-Wait a minute was she just born (Born in China from the wishing star)...that would mean MC is basically dating a 0 year old lol (Mentally teenager age or adult age mentally but physically just born) XD