My IC tells me that it might not be an A with an actual person, but at the very least it is an A with art or travel or finding herself. In other words, an A with the idea of life without me.
I actually started calling that an IA (imaginary affair) a while back. We talk about EA's and PA's, but in absence of those I'm convinced there is at least an IA taking place. The WAS imagines their knight in shining armor is out there waiting to sweep them off their feet and usher them into the perfect life, if only they can ditch the LBS they'll be free to go find their IA partner. In some ways an IA is the most difficult affair to overcome because the IA partner is limited only by the WAS's imagination. EA's and especially PA's will eventually turn up the affair partner's true colors, but in an IA the partner is pure perfection.
Good luck with your surgery, hope it goes smoothly!