I have a friend who calls me to talk and she brings up a mutual friend who I'm actually no longer…

I have a friend who calls me to talk and she brings up a mutual friend who I'm actually no longer friends with. She tells me how this females called her asking for her to buy some red bottoms off of her cause she needs money for pampers . Being a good person my friend just went and bought her baby some pampers cause she only had one left. One I'm upset that my friend is talking to me about someone I don't really like so makes me feel like she may run to her and tell my business. And two she just made me not like that girl even more. Red bottoms aren't cheap shit that girl has every thing designer and she seems to always struggle with money when it comes to buying her babies needs but doesn't struggle when it comes to buying expensive things for herself. That makes no sense. I told my friend off and said don't tell me things like that cause I'll beat her up for not putting her son first.