Does anyone speak "Cat?"

We've sort of adopted 2 stray cats to go with the one we already had. Apparently they found us because of our outside cat food.

Last month one gave birth to three adorable kittens. Though we had made her a nice, warm place in the corner -- she, apparently, wanted more privacy than that. She delivered under the kids' bed.

The second Mom gave birth 11 days later; following suit. She did it under MY bed! :)

Now they're nearly a month old. We've done all we know to do to care for them but the mother of the first batch walks around the house all day making noises like this: errrrrruh, errrrruh, eruuuh. Does anyone on here speak 'cat'? :)

Sometimes it means 'I'm hungry', or 'I'm thirsty', or 'I wanna go out'. And, sometimes she wants to be petted or put under the sink faucet to drink. But, today, I'm not sure what it means and ..... I'm wishing that I did.