My friends mum wants to be as “thin”As me??

Sam

I can’t find a group chat so I’m sorry if this is the wrong place to say this. So I recently turned 14 and for a while now my friends mum has literally been saying she wants to have my body and I feel really uncomfortable. I’m around 5’4 and weigh around 38kg. My body’s a box and I hate it I’ve been gaining weight recently but yeah. My friend always tells my she says wants to be my weight and she has told me herself and I feel bad. I don’t want to be an example? Idk. she’s over 30 I think 40 something? I’m not sure what I should do about this can Someone help?