In short, Catherine is searching for attractive young males. She is a lady on a mission, just divorced, and she has Xander in her sights. When she shows up at his place unannounced, she quickly clarifies her intentions. At first, Xander isn't having it, but she's the more seasoned one, so once she flashes her underwear and repeatedly runs his dick through his pants, the gig is over. She's on her hands and knees before he can say no more times, and no no no turns into yes yes yes!