The more I think about this update the more odd it sems to me.
Bobby's actions are motivated by what benefits him, like he went to steal the phone for Liza not because it's the right thing to do. But it is so that he can use the video to blackmail Liza into doing things for him and corrupting her in the process.
His action in the latest update have no benefits to him (besides the physical sexual gratification) and in fact incriminates himself by recording his crime and giving Lucy leverage over him if she finds the video he made.
I'm willing to give
ZipTieFun the benefit of doubt and see where he is going with the story, but this update shows that he don't have "what benefits Bobby in the long run if he does this" in his thoughts.
I don't know, I may be over thinking this.