There were whispers, rumours, of incest between the Seelenfreund siblings. The fact that they were both single wasn't helping at all. They knew the rumours weren't true, of course. But that put the thought in their head.
The Seelenfreund siblings were not nearly as sneaky as they thought they were. But interestingly enough, their limo driver had experienced this many times before, and was completely willing to tell them about how he got into this situation, and help them along.