From them, Wouter found out that indeed, Tiel had something to do with a woman they all already knew was Sarafina Asalt. They often met, only for an hour or two, speaking about things they couldn't hear, so they didn't know what. But it seemed the two were meeting strictly for business, because one time they noticed the girl, Sara, had come with a man—Augustus.
Sara and Augustus were openly in a romantic relationship, which didn't look like it bothered Tiel so much. This was what Asti's younger brother said. That as long as it was nothing romantic, Asti didn't care. All she wanted was to know how much time Tiel was spending with Celeste—which was sick in Wouter's opinion. Although, deep down, he could understand it.
By the end of it, which was something he used to dread long ago, they realized Wouter was never going to fulfill his promise.