Yep - where’s the pictures.
How old are the kittens now? It almost sounds like she was very ill or poisoned. She might have retained something - maybe someone who is good about cats will chime in.
My son and ex-DIL raised quite a few kittens by bottle. It’s hard work.
I figure they are going on 4 weeks. I thought about that too because a few years back we all thought someone was poisoning cats. The babies seem healthly though. I’m hoping she will show up “starving” She used to take off when she was expecting too. Lot of good that will do the babies though, caz she’ll be dry.