I'm so confused as to how some people had no idea this was a throuple with the twins. Isn'...

I'm so confused as to how some people had no idea this was a throuple with the twins. Isn't the cover incredibly obvious? plus that dark haired love Interest is hardly even present, I completely forgot about him. Even the switching was so obvious with how the second twin "forgot" to bring mc water and that whole random "break" they took during seggs