She's so close! If I remember right the kittens will stop moving close to birth, they are being lined up for the birth canal. She'll start having contractions, you'll see her abdomen clenching, she'll have a bloody discharge, and she might meow. Watch her closely, if she is in active labor for more than an hour and no kittens, call your vet, I hope they have an answering service or another number to call off hours. I'll pray for both of you!