Kinda shaky translation, so since it was くれる to くれなきゃ, I was able to figure out she's telling him to do something for her. Kanji-wise it's something like "to keep company" or "to entertain", along those lines, so I just wanted a sanity check, or if someone's got better vocab to put in there, feel free to fix it up. Was a little unsure what しんじゃう did in this context as well.