Unfortunate

The girl grits her teeth and tried to persuade him harder, "Take me with you and my whole body and soul is yours." 

Seeing all this, David looked at Mark, confused. Mark was not the type to accept anything without benefit. In this situation, he knew Mark was clearly playing with her. The girl was trying to sell her body to him and Mark appeared to be interested. But that is not who he is. He was never interested in that kind of thing from his observations. 

He also knew that the girl could not offer him any more than her body. She has nothing. So why is Mark toying with her? Mark smirked and turned towards him and asked, "What do you think, David?" 

He could only shrug and say, "Depends on you. I don't see any benefit." Mark turned back towards her and said, "Well, off we go now. Try your best and survive." his tone became cold at the end as he went towards the door, not intending to stop. David and Suzie followed him from behind.