Why did jack and annie break up in speed 2?

Question

how did the movie show it happening

Answer 1

I don't think they told, specifically, in Speed 2. Here's what IMDb said:

"Annie Porter is thrilled when her boyfriend Alex Shaw presents her with two tickets for a cruise to the Bahamas on a Norwegian luxury liner. The trip is a peace offering presented because Annie has just learned that Alex is a police officer who's been lying to her about his choice of profession. Alex lied because Annie didn't want to date any more cops after what happened with the bus in Los Angeles."

This implies that Annie and Jack broke up because Jack continued to be a cop and Annie felt uncomfortable about it. Being a cop is a dangerous job and a girlfriend, boyfriend, or spouse has to come to grips with it...or not.

Answer 2

I don't remember, but do yourself a favor and pretend Speed 2 never happened. That's how horrible it was!