Rory could see what the detective was insinuating. She is meaning to say that Liam was angry to see Derick's car and he went back to the bar to "bring Allison home" as she mentioned earlier.
The detective is insinuating that she had something going on with Derick and that Liam doubted her too.
"Your husband, Mrs. Roberts," the detective raised her voice. She was not impressed with Rory's outburst. "We have him on footage kicking agent Roberts' car. And he broke his phone after he made that call to you from the bar. We talked to agent Roberts' ex-wife. She was so sure that you were the reason for the end of their marriage. She said you were interfering in their life so much and even caused fights between the couple. She said she could not bear it and had to end their marriage. So, would you mind explaining to us your relationship with agent Roberts? If both of your spouses were doubting the relationship..."
As she was speaking, Rory stood up.
