Some girls celebrate their 18th birthday by registering to vote, catching R-rated films or even buying an experimental pack of cigarettes. Not Eliot Spitzer’s Achilles’ heel, Kristen (aka Ashley Alexandra Dupré).

Guess how Ashley spent her big day? We can exclusively reveal the first shots of the call girl’s romping week of X-rated shoots with Girls Gone Wild. The above stills are the first to surface from her raunchy video debut, Spring Break 2005: Anything Goes.

Clearly Joe Francis’ skin set was ...