I'm not really understanding what is going on? Like, is Lisa gone or what? I'm getting tidbits here and there about Lisa handling a gun and kicking Dean out, but they're still together? I don't get it. Enlighten me please?

Lisa needs to take Ben and run in the opposite direction, because if what I'm reading is true they are fucking up Lisa's (nonexistent) characterization and personality with just adding more conflict and drama into Dean's life and it's not healthy at all. :/