תרגום - צרפתית-אנגלית - Tu m'emmènes? Je me ferai toute petite, promis.

Meaning:

Someone wants to be taken somwhere ("emmener").

In french, "se faire toute petit" means to keep low profile, not screw around, to keep quiet and stuff.

Here, it seems that in order to tag along with the other person, he/she has to stay quiet/low profile/not messing around.