I would agree kev, she'll either be sulking or catching her own food. Cats won't starve. Keep going round there, in case she's feeling lazy and wants her convenience food, but if she doesn't eat it, she won't starve. She's missing her family, that's all.
My mother's cat didnt eat at all while she was in Hospital, but didnt lost weight because the sly little mutt was mugging fishy and god knows what from the rest of the street who were all feeding her.