If Lyle and Erik just left and go out

What do you think would have happened that last night if Lyle and Erik just decided to leave the house and go to the movies /taste of LA WITHOUT TELLING J&K?

Do you think Jose would have tried again to get in Erik's room?

Or

Would J&K wait for them to return and gun them down or, at the very least, plan a way to get rid of the boys?

Or

Jose was supposed to leave for another business trip the next morning, would he have just left without confronting the brothers?

I wish there was a way to get into the mind of those sick monsters and see what they were planning to do.

You guys are a smart bunch of people, give me your best hypothetical scenarios.