model for two tables

[eluser]davidbehler[/eluser]
You can use as many tables per model as you like. True, many out there try to use only 1 table per model, but seriously: Why?

Most of the time 1 table depends on the other (like in your case) and then you have to mix them anyways. I usually have 1 model per controller that deals with whatever tables the controller needs. If there happens to be the same function in multiple models, I create a common model that contains the functions that otherwise would be duplicate.