ideas????

so I put a selfie of myself on fb using my mum's iPhone to take the 写真 infront of a mirror (so u can see the iPhone in the picture) and my friend コメントしました saying

'how come when eva u take a 写真 of ur self its always on ur mums iphone??? :)'

she has 発言しました it before and it's meant to 表示する people that it's not my phone, i don't know why she does it so can あなた just please help me with a good comeback that's not rude または mean?