Moved out, working on GAL

[fightin]

Well everyone cancelled again for the house showing. Looks like my sitch might get a little more complex so I'd like some input. So my ex that I own the rental house with is also going through a split and needs a place to live. We already own the house and if we're going to have to pay the mortgage while it sits empty we might as well move in.

We would just be roommates as I have zero romantic interest in my ex, but my W would lose her sh** if she found out I moved in with my ex and would never believe it was platonic, but for me it is just a means to an end. I get my own space (in comparison to living with my parents) in a cute, clean place and we could work on the house while we live there to get it ready to sell in the Spring so it makes financial sense, but I imagine living with an ex would be quite awkward. Thinking of getting a 3rd roommate too to make it even more economical. It is a 3 bed/ 2 bath.

What kind of damage could this do between my W and I and should I even care how my W would feel about it considering she asked me for a D?