She adds some extra excitement between my ears, because she looks very much like a more busty version of one of my nieces on my wife's side (it's ok to lust after non-blood relatives, isn't it?), who is now in her late-20s.
The underwater photos also remind me of a day years ago, when my wife and I were in her older sister's pool. Her busty younger sister (who flirted with me constantly when she was age 18-24) was swimming underwater, and stopped right in front of me. I can only imagine she was getting a good look at my package in my white bathing suit, and assumed that no one knew what she was up to (I did).
Anyway, busty Christina has lots of gifs where she's bouncing what she's got. I also found a rare photo of her getting the bone!