Defencelessly exposed - Used by stepfather & stepson!

Why on earth me? How could I let that guy in the bar pick me up? He had told me that his son was going through a lot because he had been rejected by his girlfriend. At first I thought we'd start with a pair of little bondage games, but when his junior was suddenly in the room and his perverted dad said he had a surprise for him, I realised everything! Is it sick if I tell you that the whole situation kind of turned me on?