This is not what if felt like to me. It's a rough start, you have to roleplay a cold-hearted jerk taking advantage of Emily, but once you're past the last choice that gets you on the love route, you can fully meet her love and dedication. With the added bonus that Emily will be pleasantly surprised by your gradual change of heart and it feels like she's winning the MC over. Feels more earned for her, than if you assume from the beginning that you also had a crush for her. The initial stabs you inflict on her expectations are well worth it, the story is very competent on giving you Emily's feelings as you go. It's different from the usual tropes of dom/sub dynamics, it's not like you're giving her some "harsh love" or "training", that would be just another mediocre corruption game. Here, the sharing route can be just as loving as the "true love" route, only much kinkier. The best thing is that it gives Emily a very central role, while the MC's "Chad" personality balances that, you're always in control, never just "there for the ride".
I never played the NTR route, and never will. It shows from the story and your options that it's hard and I'm not into that kind of content, but the sharing route is rewarding if you like it for the kink of sharing, but don't want to play a cuck.
Don't mind the brothel ending, it's light-hearted, as much of the sharing route is. There's a good combination of kinky fantasy with believability, but it's a fantasy story. Emily's one of the few NTS characters that doesn't fail at convincing you that's she's 100% genuinely in love and dedicated to the MC, no matter how much you allow her to do with other guys. So many games try that and it feels like your LI is just making fun of her cucky hubby - but, fortunately, there's not a gram of cuckoldress in Emily, and not a gram of cuckold in the MC, plenty of teasing, a perfect sharing route.