Not the best model I know. But you work with what you got :)
I finally found some time to take a similar shot of my wife and baby for our Christmas card. finally got it done. Full results can be seen here
2 70ws strobes, fired at background to blow it out and provide a bit of backlighting (background done in post, wish i could do it naturally).
A sb-25 and 24 with better bounce cards to the left and right at 1/4 and 1/8 respectively.
white low ceiling provided the hairlight.
Some extra sharpening done in post.