Very nice posing and great smiles. This photo could be even better with some improvements in lighting. The light source appears to be very close so that the boy is lit a bit hot, mom is lit about right. The light falls off very quickly, but not enough to prevent illuminating some background objects. You might try a black sheet behind the subjects if you desire a black background. I also suggest a little bit of fill light and keep the main back a bit more. Nice catch light in the eyes, which is something to look for when using multiple lights (it can be hard to get just right).
wasn't he on the slide last week? It's a beautiful self-portrait. What a handsome couple you are. Nicely done. My only suggestion is to take those two items out of the background. Well lit, nicely composed.
A vertical orientation would have looked better, as there is nothing interesting on either side of the subject. More lighting on the hair would have been good too. Nice pose though, cute kid :)