Speaker Width?

I knew better than to even open that one.

The responders are being nice to you. For good sound, you want to start with your speakers 1/3 from the back wall of the length of the room and 1/3 from each of the sidewalls to start. Check out speaker positioning from Cardas, Vandersteen and guy smith. Ultimately you don’t want anything that’s big between the speakers and if you have too, the cabinet should be way behind the speakers and sitting low. Why compromise good equipment

@bclark,
Just how attached are you to this girlfriend? ;^)

Seriously, are you asking about speaker placement because you are unsatisfied with the sound, or just curious how much it can improve?
All the "rules" about speaker placement are to help you predict how speakers MAY sound best; they are not guarantees by any means. My speaker manufacturer recommends the back of their models be no MORE than 20" from the wall behind them. ( I think they sound better at 32") There are CDs that can help You test locations, such as the one by IsoTek. (No affiliation)

https://www.isoteksystems.com/product/essentials/ultimate-system-set-up-disc/

But the best bet I can see from the picture is to get the speaker to your Right further away from the side wall. This would probably improve symmetry a lot.
Best of luck.

Too wide should be at least 6-8ft apart 
and 8ft. where you sit.
when your speakers are too far apart you are decoupling the speakers from each other-mid bass,when you don’t have midbass you don’t have rhythm.
speakers should be slightly toed in 
unless you are using your speakers as headphones.

+1 for erik_squires