Looking for our kittens

a couple of days ago we came back from South Padre. When we came home our cat was a lot skinnier that when we left(we thought she was pregnant before we left.)Now, since we came home I had been looking for them. All we know right now is our “mom” cat has been disappearing every once in a while. We still don’t know where she is going and we think it is to her babies. At first, we thought she was under the house, but when we look under we don’t see her or her kittens. Since we don’t see her or kittens, we think she is hiding them from us somewhere else.  Whenever we find them I will post and tell you guys.