Hey OP, sorry you are here. I don't post much in the JFO forum as others tend to give better advice than me. As my tag says, I'm an outlier, so take what I have with a grain of salt. It is only my opinion, but it's good to have plurality.
I feel that the default reaction to infidelity should be D (divorce) since the WS has already engaged in breach of contract, the M is already over. By taking a wait and see approach, a BS is actually sending the message that they are still in the M. (Its like shopping for a car and comm7nicating to the salesperson that you really like the car but are a lityle unsure. In contrast, I like the movie Speed where Keanu shoots the hostage in the leg and removes the option the hostage taker was counting on. It's more of an "oh shit,I didn't know you could do that" moment. I think now they call it FAFO. One book I recommend is Sun Tzu's the Art of War as reading. It talks about power and perception.
You see, I don't think that there really three choices, R (reconcilliation), wait or D, because waiting seems to similar to staying for the WS, at least its a cousin to staying. Often, IMHO they feel that they can wait you out, trickle truth you, keep you tethered until they come around, assuming it wasnt an exit affair. If you choose to end the reationship (at the very least in your heart and mind) then you flip the script and are now in a position of power, deciding how and what happens next. Then the onus to fix the relationship falls completely on the WS as they know the clock is ticking. They are much more likely to have what we call rheir Damascus moment. The kicker is that you must be ready to end it, otherwise you become a paper tiger, a security guard who tells you to stop or he'll be forced to say stop again.
In mybexperience, people will often hold beliefs or attitudes that cost them nothing, that come with no actual price. I call it theoretical morality. It is only when a belief or action costs them something, usually money or time, that we can really see if they actually believe it. Just look at how many APs dump the WS once they are outed. All the lies come out and it turns out that they never really intended to leave their spouse. It's entertaining to see the shock on a Ws face when they realize that they had been played...but I digress.
Your WW sounds like an attention hound who likes to play psychological games, toying with her APs. The photos she senda indicate that she likes eliciting a reactio without investing herself. The photos of other women provide her with both a sense of safety and a plausable argument in her mind that she did not cross some imagined hatd boundary. In fact, she reminds me of an internet troll who hides behind a keyboard feeling clever. This is a huge red flag as it may indicate a far deeper mental or personality issue. Luke an addict, she will move the hard boundary as her normal behaviour no longer provides the same stimulation.
But even deeper than her bebaviour is your behaviour in the M (marriage). Your dead bedroom, long hours of gaming, depression, all lead me to suspect that you may be deeply unhappy in your M and that you might have been white knuckling it long before Dday, something to explore in IC. You see, I was M for 27 year before I filed. It was only after many years of detoxing from the relationship and really looking inwards that I realized that I had been deeply unhappy in my M and masking that behaviour with work, hobbies, renos, and even porn. I had built a world to retreat into because I could not admit my real world was making me so unhappy.
One book I would highly recommend is Cheating in a Nutshell. The authors use research and personal experience to create an easy to read text. They have a bias which aligns with mine, but the real value lies in their approach in explaining to the BS what is happening in their mind and body and normalizing it. Theyvwalk you through why your body is doing crazy shit. Reading it made me feel like I was normal and allowed me yo forgive myself for my less than ideal reactions and behaviours.
I'm many years out now and at a place I can now call myself healed. There are scars but I'm good now. For me, D was the best option. It might not be for you. I hope that there isn't more to your story, but prepare yourself for more. More often than not, there is. It's just human nature to minimize. Good luck. Hoping for good things for you.