I'm starting to wonder if that chick is his gal pal:
from superficial
If you compare the faces, the chick in this photo with the printed bikini looks exactly like hulks galpal.
Notice the glasses on her here:
http://www.blogsmithmedia.com/stadium.weblogsinc.com/tmz/images/2008/04/_0002_602914_full.jpg
now look back at the oily photo. chick has the glasses:
In conclusion, these photos are likely of the hulkster oiling up his daughter's friend who happens to be his girlfriend now.