No, you're not the only one to notice. It was the one thing that struck me as odd about that evening - it was an
overreaction if it was about Brad being uncomfortable with Ricki in the house - which I don't believe it was. That was a cleverly edited scene that took Brad's uneasiness about something and added it on to his speech about how much he wanted to kiss Emily, but wouldn't. Brad fanning himself and Emily acting embarrassed, but happy, makes me think he told her how aroused he was and gauging by Emily's reaction, she was pleased.
ETA: I didn't watch Trista's season - for those who say this scene reminded you of Trista and Ryan, was my analysis what happened with those two?