From your logic, as Ukhti is "your" sister so it can't mean sister in Islam, then how can you say this ayat is not saying... you can't marry your sisters(from your mother) and you cannot marry two of YOUR sisters(from your mother again) together like they used to before?
Brother, I don't know what the practice was in those days.
Can you say influencial women were not having time with their male slaves. If you start thinking in the context of slavery was allowed like No2 Islamist think, it's very easy to drive at this fact that women ARE still allowed to sleep with their male slaves without marryig them from the same verses. Something NO one wants to even listen to!
So if you keep in mind that 4:3 is about multiple marriages(even though it's clearly not!) and 24:32 is just the duty of central authority to marry ALL singles to avoid lewdness(leaving them(all kinds of singles) no choice of their own whatsoever), then you can come up with any translation for this verse you like!
But just for clarity, please think what wives of a person would be to each other, even if you thought it was allowed before?