Maybe Nicole would be less satisfied with an additional partner thrown in. It might be what they both need to spice up their happy time. We could see a new Nicole wearing her hair down and living in a threesome with Victoria as if the early dream was predicting a coming event.
In all actuality, I would expect her and the main character to split up and for her to show up in Sunshine Bay later. At that point, she would have to give in to some new experiences if she wanted to salvage anything with the main character. I guess we'll have to see what becomes of her.