This shot of Sonia and Dillon (my wife and son incidentally) was not taken in a studio, but on a bed using nothing but a sheet, window light and one bounced flash.
I laid a white, double sheet on the bed, and over the headboard, so that it doubled as a backdrop. The open window was to my left, and I had a Metz CL-4 flashgun aimed at the ceiling.
I used Photoshop to lose all the wrinkles in the sheet behind and increased the brightness for that studio look.
A very simple and cheap set-up and a lot less hassle than a studio. It is also a great way to practice before committing any great expense on studio lighting.