Had not noticed the BBW part till Roxy made mention of it.
However, look closely at the pic... if BBW, there should be some sign of that in the neck line. I see no sign of BBW. Instead, not only do I not see any signs of a collar bone, I see sharp angles where the neck meets the thorax; don't think there should be any sharp angles there... think the meeting points should be seamlessly non-angular ?
I could be wrong, but I still say she's silicone rubber.