Im not a pro, but I beleive they won't eat when they are close. Also sounds like she could be trying to nest. Also Another sign is panting. But you want to keep an eye on her, but not bother her. She is looking for a safe place to have them, so your other cats wont get her babies. Are you going to put her up somewhere? Or just let her have them whereever? Closets work well. Sounds like she is definetly looking for a place. Let us know, how exciting.....