All four babies at a little over two weeks old.
Flynn and Sheba are in the upper-left corner and Mosaic and Leo in the lower-right.

Sheba at about three and a half months old.
She's quite a good-looking little girl, if a bit shy with strangers.

Leo at about three and a half months old. 
He's a good deal larger than his sisters, so we're guessing 
he's going to be a big guy. He was shy at first, but then climbed
onto my lap and smeared his nose all over my face.