A great swimmer in the family

Last night, we watched the baby doing what looked like a graceful back stroke. My tummy rippled from left to right and back again. This is pretty impressive for 17 weeks. Cubby teased about having twins. I reminded him of the two sonograms that show only one beautiful baby. Will we have a graceful swimmer or is the baby already growing out of room? YIKES! I don't like that thought.