Love the candid and fun feel of this photo. The b&w works well to serve the challenge theme. IMHO the lighting seems a tad harsh (I assume flash was used?) and is most apparent in the center subject. Just my opinion, nice shot nonetheless
Interesting twist to have the subjects in B&W to set them apart from the woman. My only concern is that the background is B&W also, which tends to make the woman the subject.
The treatment you've chosen makes it look more like the person in color has been cut from a different photo and photoshopped into this one. A bit overboard for my tastes. I also find the plants "growing" out of the brothers heads are distracting.
Unusual but effective take of the challenge topic. I would like to have seen it with just the brothers in b/w to see if that were better. But good score anyway.