Roma pass vs. Colosseum/Forum tickets?

Going to Rome with girlfriend in a couple of weeks, and finalizing last minute details.

I am confused about ticketing.

When buying a ticket for the Colosseum, we can also get into the Roman Forum/Palatine hill within 2 consecutive days.

If I look at the Roma Pass; it says that I can have "free" access to 2 museums in 3 days (as well as other goodies)

Does that include both the Colosseum and Forum/Palatine AND another museum during the 3 days? Do I have to do the Colosseum and Forum/Palatine within 2 consecutive days and a second museum within the 3 consecutive days ?

We plan to do the Colosseum (not that long a visit AFAIRemember) one morning, the Palatine Hill/Forum another morning and the "second" museum the third day. (all depending on the weather).

Edit:

We finally only visited the Forum and Palatine hills; we skipped the Colosseum this time.

We used the Roma pass for a couple of other exhibits/museums.

Thanks.