Notice towards the end of the video her boobs are so slippery his dick keeps slipping out. And he tries so hard to keep it in. Only shows you how much he is enjoying it.
The old 44DDD, measured in HS as a 44DD, admits she's put on a little weight adds a D. Classic BBW move. Not knocking it, love big guns like this, but this is more like a 48FF, maybe even G's