Kittens under the house...

My girlfriend and I found kittens under the house this morning. I've seen the mother several times, but always assumed she was a neighbor's cat passing through the yard-- it wasn't until this morning when I saw her with the four kittens that I realized she's been nursing them here. In the final frame of the video, you can see the fourth kitten (the mother wasn't around at the time I filmed this).