What movie am I confusing this one with?

I could have sworn when I saw this the first time Tim goes to Joan's house after the conference and she chastises him for not being able to separate "what happens in Cedar Rapids" from real life... like he almost ruins her marriage and family life, which she has no interest in giving up. I must be thinking of a different movie where the characters are in a similar situation and this happens. When the credits rolled on my second viewing I was like "wait, I thought there was a whole later section where that happened". So what movie am I thinking of? Anyone? Bueller?