This is a good example of when posting more than one shot will help with further critique. Ordinarily I recoil at someone posting half a dozen shots asking for C&C. I usually don't offer much in that case.
Here that giant watermark superimposed over one subject is right out. I presume this is one shot that the family will not receive.
The couch and most of the group is nearly centered in the frame, but one person's legs and feet are way off to one side. That pose will work in different circumstances, but not this time.
To get a more "photographic" balance in your lighting, you might try moving the PLM more to the left, and just a bit closer to your subjects, and aim it to "rake" your subject's faces more, and catch the reflector more. Think of the set as a circle, where the camera is at "six o'clock", the subjects are at 12 o'clock, your main light is at around 8 o'clock (you'll have to experiment with the exact placement) and the reflector is at 4 o'clock (same for that).
Having fixed the legs sticking way out to the right, the next thing you'll notice is that there is a lot of empty space around your subjects, particularly a lot above their heads.
Speaking for myself, I would like to see a couple more shots from this session, particularly if they are way different. If they're the same, then never mind.