I was trying to avoid thinking in terms of the basic 8 and the automatic "close/resolution".
Of course, my answer was, pretty much any step that she could do, when she is on her left foot if she wasn't crossed. It appears that at some point the subject changed to what to do after step 4, if you then lead the follower to move her left like she was going to cross, but then don't allow her to complete the cross/step/whatever you care to call it. In this scenario, the weight is still on her right foot, so you can lead her to step anywhere that's possible (front, side, back).
At the end of the day, if her weight is on her left foot (whether crossed or not), the next step will be on to her right foot (and it can be in any direction: front, side, or back; and BTW). The lead might be slightly different though, depending on whether she is at the cross or not.
Going off on a bit of a tangent that I hope will relate to the OP, any pattern can be broken up into pieces, and then the pieces plugged into other steps, then going completely away from the pattern. If you don't want to think of the 8CB, then it might be worth considering just walking to the cross, without using steps 1 & 2. Either just get outside parallel, like the 8CB does, or even better, go into cross system. In either scenario you can walk the follower to the cross, then just keep walking forward and repeat. As soon as you have some comfort level with this, then just try walking her to the cross, and doing something else (like a side step to your left, starting a CCW turn). Really, the trick is just to think of any step you can lead when she is on her left foot (as that's where her weight is after the cross).
I was taught on the 8CB, but it's just one of many drills. It's not the dance.