YR: JT and Victoria "hook up"

Why JT and Victoria sleeping together works better storyline wise than JT falling back into bed with Colleen:

There are many more ripples to the story if JT and Victoria hook up. As in the Brad dynamic. And if/when Brad finds out, does he or doesn't he tell Colleen? And if Brad dumps Victoria once and for all over this, does he seek solace in Sharon. And how does that affect the Nick/Phyllis affair?

This isn't just a triangle (which would only be if you have JT and Colleen hook up) but more like an octagon.