That Elle and Alice threesome did irk me though I don't care what anybody says the MC was absolutely the cuck in that situation
I agree, but I almost kind of feel like you bring it on yourself in that situation.
The first time you have to choose between your cousin and your blatant childhood friend love interest, your cousin kind of acts like a shit and your friend clearly wants to be alone with you. If you go for both anyway, your cousin is clearly being aggressively sexual and moving in on your girl, while continuing to be a bit of an ass.
Then, when the actual threesome happens, your cousin is clearly showing ulterior motives. It's pretty obvious she's way more interested in the other girl than she is in you. At which point warning bells should be going off for you.
If you actually care about relationships rather than just getting laid in every possible way, you should probably be telling your cousin to get lost in both scenarios.
If you still go through with the threesome, you probably deserve to get cucked.
Though you can still be a mega-chad if you want - let the two of them hook up, and just screw both of their mothers to retain your dominance.
How do I know what routes I am on?, I want to get the corruption mom route and the dom sis route but I don't see anything that tells me what route I am on and none of the options seem clear and do the other women have differnt routes based on what I choose?
There really isn't a dedicated sub or dom route for the sister - it's mostly just that, when scenes with her come up, you can kind of let her take control and dom or you can put her in her place and make her sub. So it's pretty easy to unlock both sets of scenes in the gallery just by picking one choice, watching the scene, then going back to pick the other choice.
With the mom the split is early on, and once you're on one you pretty much stay on it. You can see which route you're following judging by which scenes you're unlocking in the gallery as you go. If you get the Night Drink scenes (and later the Mom Sex Love scene) you're on the love route, while you'll get the Night Games scenes (and the Mom Sex Corr scene) if you're on the corruption route.
There's not a huge difference between the two, though - even on the corruption route you're very loving with her, while on the love route you're still having sex.