Scene is really well done. However, you should focus a bit more on character building before jumping into the good stuff. For example, who is the wife? How DOES she treat her slave usually? How was she educated? Is she a kind person? Is she crafty?
What about the guy that's throating her? Who is he? Can you forge some sort of relationship between him and the husband to make this better? Was he always eyeing her before? Is this a crime of passion or meditated? Oral sodomy is considered rape in Rome, btw. You can get killed for this. Severely punished at least.
You need a bit more exposition to give the scene that OOMF when you do it. Great art overall. Story telling and build up needs more work. And for the love of god, please don't add 5 girls in your game like every shitty western ntr / blackmail dev. All you need is one or two. The storytelling binds everything together. The choices and personalities give it that touch of quality.
I'm not sure how you're planning to do your choices, but I really like devs that do dominant vs submissive. And based on actions, you unlock points. With some options and dialog only available given certain points on dom or sub. Adds a nice touch of choice without needing to do separate scenes (only different dialog).
I'm OK with choices that lead to Game Over. I know some people don't like it, but maybe if they were done with a few more layers, such as a combination of SEVERAL choices leads to Game Over rather than one.
Anyway, rooting for you. I love darker games. Here are some links for writing good characters.
You must be registered to see the links
There's also this trick:
You must be registered to see the links
1. Looks - The dazzling woman, with her blonde locks, lightly powdered face, looks up at the erect penis with her clear blue eyes.
2. Actions - She steps back, repulsed and shocked by the length and girth of the man's penis.
3. Effect on Others - The legionaries stare at her glistening neck line, tracing the shape of her supple breasts, imagining what wonders lies beneath the white toga.
4. Thoughts - You do this already
5. Speech - You do this already