Should I buy her a new phone?

Mya

My sons godmother messaged me the other night saying her kids wanted to keep my almost 2 year old for the weekend. Her kids are 17, 13, and 9. My mother and his godmom were bffs growing up and I grew up with her children. So anyway I got a call tonight saying I need to replace the 13 year olds iPhone 7, because my son threw hers in the toilet. First of all I just got a job as a waitress making 2.13 an hour and about $40 tips in a night about 4 nights a week IF THAT. I cant afford that. and I feel like I shouldn't have to because he was under their supervision. His dad makes more money but he already said no when I told him. I feel bad but I honestly dont feel don't feel like thats my responsibility when they were supposed to be watching him. Opinions?

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