The demographic for this series is probably older, middle aged, viewers. People who are very likely to tune out because of one of the characters turns lesbian.
My wife and I were wondering and were suspicious. We were kind of expecting it since it seems to be the thing to do with modern TV series... for shock value, introduce a lesbian relationship during season 2.
He art had only been in the one apartment--how did the dealer know about it? I figured it was just an easy ploy to introduce exactly what happened.