It wasn't lost on Cassidy that Olivia touched Amaro's arm first when her phone beeped the message alert. Or that it was Amaro that she told 'we gotta to go' before she told him. He also didn't miss the fact that Amaro grabbed Liv's jacket from the back of her chair without even a second thought. And the way she didn't look back to check on it, meant she seemed to expect that he would.
He watched his girlfriend leave Munch's retirement party with her partner and he tried not to wonder. Tried really hard not to let his suspicious mind go where it was headed. He always thought that the reason they never got off the ground last time was because of the repressed feelings she had for her old partner. He just hoped that they wouldn't crash and burn this time because of her new one.