The perverse pension - Here, sex is only allowed without condom

What a strange boarding house! I am stunned by what I have experienced. We just wanted to stay overnight. At check-in we were greeted by a nice couple. The room was clean and fine. I went to the bathroom for a moment. I didn't believe what happened next. I came back and couldn't believe my eyes. He stood there stark naked. His hard cock was in her mouth. Her husband was standing without pants. He even filmed everything. Really?! Is the couple simply seducing him? Will it now become a wild foursome?