When I tell my mom to look at something, she won't even have a quick glance at it, but when my little brother says that, she always looks right away.
この場合、次のような言い方ができますよ。
ーWhen I tell my mom to look at something, she won't even have a quick glance at it, but when my little brother says that, she always looks right away.
「私が母に何かを見てと言っても母は見もしないのに、弟が言うと母はすぐに見る」
she won't even have a quick glance at it で「彼女はそれをちらりとも見ない」と言えます。
ご参考まで!