Help! My cousin is not eating anything

My little cousin is staying at our home for summer vacation and honestly it is getting really frustrating.

She is 10 years old and she refuses to eat proper food.

It has been a week and she barely eats anything we make. The only thing she agrees to is junk food. She will stay hungry all day but wont touch home cooked meals. And the moment someone offers Maggie or food from outside she immediately says yes.

She actually comes to our house because she gets to eat whatever she wants, plus free Wi-Fi, TV, and phone.

But this year we have been going through financial issues so my mother has already said we should not spend unnecessarily. Still she keeps putting us in that situation.

Even when we try simple options like roti or rice with curd (which she likes), she just makes a face and refuses, sayint "ye toh marte time bhi na khaau main"

It feels bad to see someone’s child sitting hungry in our house when there is plwnty food available but at the same time, we cannot keep giving her junk food every day. once or twice a week is fine.

On top of that she often speaks shit about things we do or say and argues with my parents when they try to set basic rules.

And the thing is, she’s not going home anytime soon. shelll be here till July.

Right now I've told her to eat or Shell not get to watch tv. 😞

But how do i make her eat guys!!!????