getithere | Gus saw Lindsay

I'm looking for a specific story. I really don't remember what it about but, I do remember Gus and his boyfriend was at a museum and Gus saw Lindsay there and saw her cheating on Mel. I can't remember if she work there or/and the lover work there. The lover was a man. They family was living in Canada. Sorry, it not much but that all I can remember.

Thank You